chore(deps): bump azure/setup-kubectl in /.github/workflows (#770)

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

.github/workflows/e2e.yaml

@@ -48,7 +48,7 @@ jobs:
           role-session-name: Github-e2e-Rollout
           role-duration-seconds: 1200
 
-      - uses: azure/setup-kubectl@v3.2
+      - uses: azure/setup-kubectl@v4
         with:
           version: "v1.23.6"
 
@@ -93,7 +93,7 @@ jobs:
           role-session-name: Github-e2e-Rollout
           role-duration-seconds: 3600
 
-      - uses: azure/setup-kubectl@v3.2
+      - uses: azure/setup-kubectl@v4
         with:
           version: "v1.23.6"