Bump azure/setup-helm from 3 to 4 (#385)

Bumps [azure/setup-helm](https://github.com/azure/setup-helm) from 3 to 4.
- [Release notes](https://github.com/azure/setup-helm/releases)
- [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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/tests.yaml

@@ -86,7 +86,7 @@ jobs:
           version: v0.20.0
           cluster_name: kind
       - name: Install Helm
-        uses: azure/setup-helm@v3
+        uses: azure/setup-helm@v4
       - name: Install MetalLb
         run: |
           kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.13.7/config/manifests/metallb-native.yaml
@@ -135,7 +135,7 @@ jobs:
           version: v0.20.0
           cluster_name: kind
       - name: Install Helm
-        uses: azure/setup-helm@v3
+        uses: azure/setup-helm@v4
       - name: Deploy helm-chart
         run: |
           kind load docker-image local-kind-test:test
@@ -172,7 +172,7 @@ jobs:
           version: v0.20.0
           cluster_name: kind
       - name: Install Helm
-        uses: azure/setup-helm@v3
+        uses: azure/setup-helm@v4
       - name: Deploy helm-chart
         run: |
           kind load docker-image local-kind-test:test