Update ghcr.io/linuxserver/radarr Docker tag to v6 (#2115)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [ghcr.io/linuxserver/radarr](https://github.com/linuxserver/docker-radarr/packages) ([source](https://github.com/linuxserver/docker-radarr)) | major | `5.28.0` -> `6.0.4` |

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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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Reviewed-on: #2115
Co-authored-by: Renovate Bot <renovate-bot@alexlebens.net>
Co-committed-by: Renovate Bot <renovate-bot@alexlebens.net>

clusters/cl01tl/applications/radarr-anime/values.yaml

@@ -13,7 +13,7 @@ radarr-anime:
         main:
           image:
             repository: ghcr.io/linuxserver/radarr
-            tag: 5.28.0@sha256:c984533510abe0219a70e80d15bd0d212b7df21baa0913759c4ce6cc9092240b
+            tag: 6.0.4@sha256:06ac318ecb95a34c7b229568dcb4271f02cb5007bb189a0dd67a2032864187ca
             pullPolicy: IfNotPresent
           env:
             - name: TZ