Bump azure/setup-kubectl from 3.2 to 4

Bumps [azure/setup-kubectl](https://github.com/azure/setup-kubectl) from 3.2 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@v3.2...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/cd.yml

@@ -144,7 +144,7 @@ jobs:
 
       # Action Repo: https://github.com/Azure/setup-kubectl
       - name: "Stage 1: Install kubectl ${{ env.KUBECTL_VERSION }}"
-        uses: azure/setup-kubectl@v3.2
+        uses: azure/setup-kubectl@v4
         with:
           version: ${{ env.KUBECTL_VERSION }}
 
@@ -303,7 +303,7 @@ jobs:
           role-session-name: mybinder-github-cd
 
       - name: "Stage 1: Install kubectl ${{ env.KUBECTL_VERSION }}"
-        uses: azure/setup-kubectl@v3.2
+        uses: azure/setup-kubectl@v4
         with:
           version: ${{ env.KUBECTL_VERSION }}