Update azure/setup-helm action to v4

Author: renovate[bot]

.github/workflows/charts.yml

@@ -24,7 +24,7 @@ jobs:
           git config user.email "[email protected]"
 
       - name: Install Helm
-        uses: azure/setup-helm@v3
+        uses: azure/setup-helm@v4
 
       - name: Run chart-releaser
         uses: helm/[email protected]