Update outlinewiki/outline Docker tag to v0.87.3 (#1359)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [outlinewiki/outline](https://github.com/outline/outline) | minor | `0.86.1` -> `0.87.3` |

---

### Release Notes

<details>
<summary>outline/outline (outlinewiki/outline)</summary>

### [`v0.87.3`](https://github.com/outline/outline/releases/tag/v0.87.3)

[Compare Source](https://github.com/outline/outline/compare/v0.87.2...v0.87.3)

#### What's Changed

##### Improvements

- It is now possible to give group users "Manage" permissions so they can add and remove other users from a group.

##### Fixes

- OIDC flow broken when using an authentication provider on a private network in `v0.87.0`
- Importing nested lists from HTML now works correctly

### [`v0.87.2`](https://github.com/outline/outline/compare/v0.87.1...v0.87.2)

[Compare Source](https://github.com/outline/outline/compare/v0.87.1...v0.87.2)

### [`v0.87.1`](https://github.com/outline/outline/compare/v0.87.0...v0.87.1)

[Compare Source](https://github.com/outline/outline/compare/v0.87.0...v0.87.1)

### [`v0.87.0`](https://github.com/outline/outline/releases/tag/v0.87.0)

[Compare Source](https://github.com/outline/outline/compare/v0.86.1...v0.87.0)

> \[!WARNING]
> Skip this version, use v0.87.3 due to a breaking issue causing failing CSP in some browsers.

> \[!NOTE]
> This version includes multiple proactive security fixes for issues discovered during a routine security audit. Please see associated advisories:
>
> - https://github.com/outline/outline/security/advisories/GHSA-fp2g-2283-rwvj
> - https://github.com/outline/outline/security/advisories/GHSA-jfhx-7phw-9gq3
> - https://github.com/outline/outline/security/advisories/GHSA-gcj7-c9jv-fhgf

#### What's Changed

##### Improvements

- Add notifications for reactions in https://github.com/outline/outline/pull/9893
- It is now possible to split an existing code block by typing triple backticks in https://github.com/outline/outline/pull/9959
- Implement right-click context menu in https://github.com/outline/outline/pull/9883 (Available on document lists now, elsewhere soon)
- Added `relationships` API endpoints in https://github.com/outline/outline/pull/9402
- Improved error boundary with option to clear cache on repeated errors… in https://github.com/outline/outline/pull/9891
- Added support for encrypted environment variables with [dotenvx](https://dotenvx.com) in https://github.com/outline/outline/pull/9921

##### Fixes

##### Editor

- fix: Line-height too compact on editor headings in https://github.com/outline/outline/pull/9942
- fix: Scroll-to-anchor reliability in https://github.com/outline/outline/pull/9945
- fix: "Table of contents" shortcut on macOS in https://github.com/outline/outline/pull/10002
- fix: Issue with draft comment being lost when navigating directly between documents in https://github.com/outline/outline/pull/9997
- Use Sorting of mentions in a table now act correctly in https://github.com/outline/outline/pull/10011
- fix: Image caption parsed as separate paragraph on copy/paste in https://github.com/outline/outline/pull/10020
- fix: Image pasted twice in copy/paste https://github.com/outline/outline/pull/9938

##### Other

- fix: Tighten rate limits on `email.callback` endpoint in https://github.com/outline/outline/pull/9917
- fix: Use `safeEqual` in `VerificationCode` verify method in https://github.com/outline/outline/pull/9915
- fix: Allow user account lookup with mismatching email capitalization in https://github.com/outline/outline/pull/9929
- fix: Remove `attachments.redirect` sw caching in https://github.com/outline/outline/pull/9927
- fix: Remove `mime-types` usage from the browser in https://github.com/outline/outline/pull/9926
- fix: Upgrade `request-filtering-agent` in https://github.com/outline/outline/pull/9937
- fix: Increase timeout on remote file storage operations in https://github.com/outline/outline/pull/9936
- fix: Properly truncate multiline labels in sidebar in https://github.com/outline/outline/pull/9940
- fix: Drafts without a collection should be publishable by all members with update rights in https://github.com/outline/outline/pull/9941
- fix: Standardize request filtering between cloud / self-hosted in https://github.com/outline/outline/pull/9914
- chore: Removed usage of `vite-static-copy` plugin in https://github.com/outline/outline/pull/9916
- fix: Document move/copy/publish dialog now behaves better in https://github.com/outline/outline/pull/9947
- fix: Usage of `ctx.attachment` overrides explicit `Content-Type` in https://github.com/outline/outline/pull/9949
- chore: More CSP hardening in https://github.com/outline/outline/pull/9951
- fix: Frontend requests do not always send `Content-Type` header in request in https://github.com/outline/outline/pull/9954
- Display correct child document structure & auto open shared document section in https://github.com/outline/outline/pull/9854
- fix: Unable to use `DATABASE_HOST` env in https://github.com/outline/outline/pull/9977
- Include collection attachments in json export in https://github.com/outline/outline/pull/10010
- Skip Notion linked database views in https://github.com/outline/outline/pull/10018
- Map export endpoint to read permissions in https://github.com/outline/outline/pull/10019
- fix documents.import permission checks for shared parent in https://github.com/outline/outline/pull/9996
- fix: Show API key creator name in settings page in https://github.com/outline/outline/pull/10041
- fix: Update unique db constraint to account for revoked share links in https://github.com/outline/outline/pull/10022
- Add CSRF middleware in https://github.com/outline/outline/pull/10051

#### New Contributors

- [@&#8203;volodymyrkoval](https://github.com/volodymyrkoval) made their first contribution in https://github.com/outline/outline/pull/9935
- [@&#8203;esafev](https://github.com/esafev) made their first contribution in https://github.com/outline/outline/pull/10031

**Full Changelog**: https://github.com/outline/outline/compare/v0.86.1...v0.87.0

</details>

---

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Reviewed-on: #1359
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clusters/cl01tl/applications/outline/values.yaml

@@ -9,7 +9,7 @@ outline:
         main:
           image:
             repository: outlinewiki/outline
-            tag: 0.86.1
+            tag: 0.87.3
             pullPolicy: IfNotPresent
           env:
             - name: NODE_ENV