chore(deps): update commitlint/commitlint docker tag to v21.2.0 (#169)

This PR contains the following updates:

| Package | Type | Update | Change | Pending |
|---|---|---|---|---|
| [commitlint/commitlint](https://github.com/conventional-changelog/commitlint) | container | minor | `21.1.0` → `21.2.0` | `21.2.1` |

---

### Release Notes

<details>
<summary>conventional-changelog/commitlint (commitlint/commitlint)</summary>

### [`v21.2.0`](https://github.com/conventional-changelog/commitlint/blob/HEAD/CHANGELOG.md#2120-2026-06-30)

[Compare Source](https://github.com/conventional-changelog/commitlint/compare/v21.1.0...v21.2.0)

##### Features

- **resolve-extends:** resolve pure-ESM presets (conventional-changelog v7/v9/v10) ([#&#8203;4859](https://github.com/conventional-changelog/commitlint/issues/4859)) ([fdb566f](https://github.com/conventional-changelog/commitlint/commit/fdb566fe59457a786eac80e2a8cbb994638daba0))

</details>

---

### Configuration

📅 **Schedule**: (UTC)

- Branch creation
  - Only on Sunday and Saturday (`* * * * 0,6`)
- Automerge
  - Between 12:00 AM and 03:59 AM (`* 0-3 * * *`)

🚦 **Automerge**: Enabled.

♻ **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 [Mend Renovate](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My4xOTEuMiIsInVwZGF0ZWRJblZlciI6IjQzLjE5MS4yIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJraW5kL2RlcGVuZGVuY3kiXX0=-->Reviewed-on: https://gitea.com/gitea/helm-actions/pulls/169
Reviewed-by: DaanSelen <135789+daanselen@noreply.gitea.com>
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.gitea/workflows/commitlint.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   check-and-test:
     runs-on: ubuntu-latest
-    container: commitlint/commitlint:21.1.0
+    container: commitlint/commitlint:21.2.0
     steps:
       - uses: actions/checkout@v7
       - name: check PR title