Bump azure/setup-helm from 3 to 4

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

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/chart-test.yml

@@ -34,7 +34,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Set up Helm
-        uses: azure/setup-helm@v3
+        uses: azure/setup-helm@v4
         with:
           version: ${{ env.HELM_VERSION }}
       - uses: actions/setup-python@v5
@@ -87,7 +87,7 @@ jobs:
         with:
           fetch-depth: 0
       - name: Set up Helm
-        uses: azure/setup-helm@v3
+        uses: azure/setup-helm@v4
         with:
           version: ${{ env.HELM_VERSION }}
       - name: Run kubeval with legacy ingress for older k8s