chore(deps): update actions/checkout action to v6.0.3 (#22)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/checkout](https://github.com/actions/checkout) | action | patch | `v6.0.2` → `v6.0.3` |

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### Release Notes

<details>
<summary>actions/checkout (actions/checkout)</summary>

### [`v6.0.3`](https://github.com/actions/checkout/blob/HEAD/CHANGELOG.md#v603)

[Compare Source](https://github.com/actions/checkout/compare/v6.0.2...v6.0.3)

- Fix checkout init for SHA-256 repositories by [@&#8203;yaananth](https://github.com/yaananth) in [#&#8203;2439](https://github.com/actions/checkout/pull/2439)
- fix: expand merge commit SHA regex and add SHA-256 test cases by [@&#8203;yaananth](https://github.com/yaananth) in [#&#8203;2414](https://github.com/actions/checkout/pull/2414)

</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 becomes conflicted, 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

---

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Reviewed-on: #22
Reviewed-by: t.behrendt <2+t.behrendt@noreply.localhost>
Co-authored-by: Renovate Bot <renovate@t00n.de>
Co-committed-by: Renovate Bot <renovate@t00n.de>

.gitea/workflows/cd.yaml

@@ -13,12 +13,12 @@ jobs:
     name: Release
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
+      - uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
         with:
           fetch-depth: 0
       - name: Increment tag
         id: tag
-        uses: https://gitea.t000-n.de/t.behrendt/conventional-semantic-git-tag-increment@1e76a0ad765945c877ccb8e5a54db79060330122 # 0.1.33
+        uses: https://gitea.t000-n.de/t.behrendt/conventional-semantic-git-tag-increment@b8806ee0141a44be30e8734dff15001361be100c # 0.1.35
         with:
           token: ${{ secrets.GITEA_TOKEN }}
           prerelease: ${{ github.event_name == 'workflow_dispatch' }}