Bump azure/setup-kubectl from 3 to 4 (#249)

Bumps [azure/setup-kubectl](https://github.com/azure/setup-kubectl) from 3 to 4.
- [Release notes](https://github.com/azure/setup-kubectl/releases)
- [Changelog](https://github.com/Azure/setup-kubectl/blob/main/CHANGELOG.md)
- [Commits](Azure/setup-kubectl@v3...v4)

---
updated-dependencies:
- dependency-name: azure/setup-kubectl
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/cd.yml

@@ -55,7 +55,7 @@ jobs:
       - build
     steps:
       - name: Set up kubectl
-        uses: azure/setup-kubectl@v3
+        uses: azure/setup-kubectl@v4
       - name: Set up ID token
         uses: actions/github-script@v7
         id: id-token