chore(deps): update azure/setup-kubectl action to v5.1.0 (#65)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [azure/setup-kubectl](https://github.com/azure/setup-kubectl) | action | minor | `v5.0.0` → `v5.1.0` |

---

### Release Notes

<details>
<summary>azure/setup-kubectl (azure/setup-kubectl)</summary>

### [`v5.1.0`](https://github.com/Azure/setup-kubectl/releases/tag/v5.1.0)

[Compare Source](https://github.com/azure/setup-kubectl/compare/v5.0.0...v5.1.0)

##### Changed

- [#&#8203;243](https://github.com/azure/setup-kubectl/issues/243) [Migrate to ESM with esbuild and vitest](https://github.com/Azure/setup-kubectl/pull/243)
  - Replaced `@vercel/ncc` with `esbuild` for ESM bundling
  - Replaced `jest`/`ts-jest` with `vitest` for testing
  - Upgraded `@actions/core` to `^3.0.0`, `@actions/exec` to `^3.0.0`, `@actions/tool-cache` to `^4.0.0`
  - Updated `tsconfig.json` to `NodeNext` module resolution
- Add `npm run build` step to CI unit-tests workflow

##### Security

- [#&#8203;242](https://github.com/azure/setup-kubectl/issues/242) [Bump picomatch](https://github.com/Azure/setup-kubectl/pull/242)
- [#&#8203;244](https://github.com/azure/setup-kubectl/issues/244) [Bump handlebars from 4.7.8 to 4.7.9](https://github.com/Azure/setup-kubectl/pull/244)
- [#&#8203;247](https://github.com/azure/setup-kubectl/issues/247) [Bump vite from 8.0.3 to 8.0.5](https://github.com/Azure/setup-kubectl/pull/247)
- [#&#8203;245](https://github.com/azure/setup-kubectl/issues/245) [Bump github/codeql-action in CI workflows](https://github.com/Azure/setup-kubectl/pull/245)

</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

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiI0My41LjQiLCJ1cGRhdGVkSW5WZXIiOiI0My41LjQiLCJ0YXJnZXRCcmFuY2giOiJtYWluIiwibGFiZWxzIjpbImFjdGlvbiIsImRlcHMiXX0=-->

Reviewed-on: https://gitea.t000-n.de/t.behrendt/k/pulls/65
Reviewed-by: t.behrendt <t.behrendt@noreply.localhost>
Co-authored-by: Renovate Bot <renovate@t00n.de>
Co-committed-by: Renovate Bot <renovate@t00n.de>

.gitea/workflows/validate.yaml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: azure/setup-kubectl@15650b3ad78fff148532a140b8a4c821796b2d7b # v5.0.0
+      - uses: azure/setup-kubectl@829323503d1be3d00ca8346e5391ca0b07a9ab0d # v5.1.0
       - uses: azure/k8s-set-context@89b837d75b40a7bd2ddafde837473c212db8b313 # v5.0.0
         with:
           method: kubeconfig
@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: azure/setup-kubectl@15650b3ad78fff148532a140b8a4c821796b2d7b # v5.0.0
+      - uses: azure/setup-kubectl@829323503d1be3d00ca8346e5391ca0b07a9ab0d # v5.1.0
       - uses: azure/k8s-set-context@89b837d75b40a7bd2ddafde837473c212db8b313 # v5.0.0
         with:
           method: kubeconfig
@@ -36,7 +36,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-      - uses: azure/setup-kubectl@15650b3ad78fff148532a140b8a4c821796b2d7b # v5.0.0
+      - uses: azure/setup-kubectl@829323503d1be3d00ca8346e5391ca0b07a9ab0d # v5.1.0
       - uses: azure/k8s-set-context@89b837d75b40a7bd2ddafde837473c212db8b313 # v5.0.0
         with:
           method: kubeconfig