build(deps): 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/continuous-delivery.yml

@@ -52,7 +52,7 @@ jobs:
           --create-namespace charts/edb-postgres-for-kubernetes --wait
 
       - name: Install kubectl
-        uses: azure/setup-kubectl@v3.2
+        uses: azure/setup-kubectl@v4
 
       - name: Deploy a cluster
         run: |
@@ -91,7 +91,7 @@ jobs:
 
 
       - name: Install kubectl
-        uses: azure/setup-kubectl@v3.2
+        uses: azure/setup-kubectl@v4
 
       - name: Deploy a cluster
         run: |
@@ -128,7 +128,7 @@ jobs:
           --set config.clusterWide=false \
           --create-namespace charts/edb-postgres-for-kubernetes --wait
       - name: Install kubectl
-        uses: azure/setup-kubectl@v3.2
+        uses: azure/setup-kubectl@v4
 
       - name: Deploy a cluster in the watched namespace
         run: |