chore(deps): update gitroomhq/postiz-app to v2.15.0

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [harbor.alexlebens.net/images/site-documentation](https://gitea.alexlebens.dev/alexlebens/site-documentation) | minor | `0.0.9` → `0.1.0` |

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### Release Notes

<details>
<summary>alexlebens/site-documentation (harbor.alexlebens.net/images/site-documentation)</summary>

### [`v0.1.0`](https://gitea.alexlebens.dev/alexlebens/site-documentation/compare/0.0.11...0.1.0)

[Compare Source](https://gitea.alexlebens.dev/alexlebens/site-documentation/compare/0.0.11...0.1.0)

### [`v0.0.11`](https://gitea.alexlebens.dev/alexlebens/site-documentation/compare/0.0.9...0.0.11)

[Compare Source](https://gitea.alexlebens.dev/alexlebens/site-documentation/compare/0.0.9...0.0.11)

</details>

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### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about this update again.

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 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

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This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4zLjYiLCJ1cGRhdGVkSW5WZXIiOiI0My4zLjYiLCJ0YXJnZXRCcmFuY2giOiJtYWluIiwibGFiZWxzIjpbImltYWdlIl19-->

Reviewed-on: #3848
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/helm/postiz/Chart.yaml

@@ -41,4 +41,4 @@ dependencies:
     repository: oci://harbor.alexlebens.net/helm-charts
 icon: https://cdn.jsdelivr.net/gh/selfhst/icons/png/postiz.png
 # renovate: datasource=github-releases depName=gitroomhq/postiz-app
-appVersion: v2.14.0
+appVersion: v2.15.0

clusters/cl01tl/helm/postiz/values.yaml

@@ -9,7 +9,7 @@ postiz:
         main:
           image:
             repository: ghcr.io/gitroomhq/postiz-app
-            tag: v2.14.0
+            tag: v2.15.0
             pullPolicy: IfNotPresent
           env:
             - name: MAIN_URL

clusters/cl01tl/helm/site-documentation/values.yaml

@@ -11,7 +11,7 @@ site-documentation:
         main:
           image:
             repository: harbor.alexlebens.net/images/site-documentation
-            tag: 0.0.9
+            tag: 0.1.0
             pullPolicy: IfNotPresent
           resources:
             requests: