chore(deps): update commitlint/commitlint docker tag to v20

This PR contains the following updates:

| Update | Change |
|---|---|
| lockFileMaintenance | All locks refreshed |

🔧 This Pull Request updates lock files to use the latest dependency versions.

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - Between 12:00 AM and 03:59 AM ( * 0-3 * * * ) (UTC).

🚦 **Automerge**: Enabled.

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

👻 **Immortal**: This PR will be recreated if closed unmerged. Get [config help](https://github.com/renovatebot/renovate/discussions) if that's undesired.

---

 - [ ] <!-- 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).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0MS4xOC4xIiwidXBkYXRlZEluVmVyIjoiNDEuMTguMSIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOlsia2luZC9kZXBlbmRlbmN5Il19-->

Reviewed-on: https://gitea.com/gitea/helm-actions/pulls/67
Reviewed-by: DaanSelen <daanselen@noreply.gitea.com>
Co-authored-by: Renovate Bot <renovate-bot@gitea.com>
Co-committed-by: Renovate Bot <renovate-bot@gitea.com>

.gitea/workflows/commitlint.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   check-and-test:
     runs-on: ubuntu-latest
-    container: commitlint/commitlint:19.9.1
+    container: commitlint/commitlint:20.1.0
     steps:
       - uses: actions/checkout@v5
       - name: check PR title