Update ghcr.io/twin/gatus Docker tag to v5.23.1 (#1241)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [ghcr.io/twin/gatus](https://github.com/TwiN/gatus) | minor | `v5.22.0` -> `v5.23.1` |

---

### Release Notes

<details>
<summary>TwiN/gatus (ghcr.io/twin/gatus)</summary>

### [`v5.23.1`](https://github.com/TwiN/gatus/releases/tag/v5.23.1)

[Compare Source](https://github.com/TwiN/gatus/compare/v5.23.0...v5.23.1)

#### What's Changed

- fix(ui): Update endpoints in-place instead of reloading every time by [@&#8203;TwiN](https://github.com/TwiN) in https://github.com/TwiN/gatus/pull/1209
- docs: improve `extra-labels` description by [@&#8203;salim-b](https://github.com/salim-b) in https://github.com/TwiN/gatus/pull/1208

**Full Changelog**: https://github.com/TwiN/gatus/compare/v5.23.0...v5.23.1

### [`v5.23.0`](https://github.com/TwiN/gatus/releases/tag/v5.23.0)

[Compare Source](https://github.com/TwiN/gatus/compare/v5.22.0...v5.23.0)

This is a big one, and for the occasion, I'll highlight the two big changes:

- **New UI**: That's right, a brand new modern UI. This was long overdue. I hope you like it.
- **Announcements**: Want to update your users/customers about an outage? You can, now.

![dashboard-dark](https://github.com/user-attachments/assets/03fa2e29-e2fb-4e99-9d53-7f0001885803)

Thoughts on the UI & announcements? Just like any healthy relationship, communicate with me on [TwiN/gatus#1206](https://github.com/TwiN/gatus/discussions/1206)

#### What's Changed

- feat(ui): New status page UI by [@&#8203;TwiN](https://github.com/TwiN) in https://github.com/TwiN/gatus/pull/1198
- feat: Implement announcements by [@&#8203;TwiN](https://github.com/TwiN) in https://github.com/TwiN/gatus/pull/1204
- feat(alerting): Support extra labels in email alerts by [@&#8203;appleboy](https://github.com/appleboy) in https://github.com/TwiN/gatus/pull/1191
- fix(ui): Replace filter value "nothing" by "none" by [@&#8203;TwiN](https://github.com/TwiN) in https://github.com/TwiN/gatus/pull/1202
- docs: tweak `minimum-reminder-interval` description by [@&#8203;salim-b](https://github.com/salim-b) in https://github.com/TwiN/gatus/pull/1194

**Full Changelog**: https://github.com/TwiN/gatus/compare/v5.22.0...v5.23.0

</details>

---

### 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.

---

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

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
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Reviewed-on: #1241
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/monitoring/gatus/values.yaml

@@ -7,7 +7,7 @@ gatus:
     enabled: true
   image:
     repository: ghcr.io/twin/gatus
-    tag: v5.22.0
+    tag: v5.23.1
   annotations:
     reloader.stakater.com/auto: "true"
   service: