Update alpine helm images for CI

.drone.yml

@@ -5,13 +5,13 @@ name: update-helm-charts
 steps:
   # Step 1: Lint all Helm charts
   - name: lint-charts
-    image: alpine/helm:latest
+    image: alpine/helm:3.11.0
     commands:
       - find charts -maxdepth 2 -type d | grep "/v[0-9]\\+\\.[0-9]\\+\\.[0-9]\\+$" | xargs -I {} helm lint {}
 
   # Step 2: Package only changed Helm charts
   - name: package-all-charts
-    image: alpine/helm:latest
+    image: alpine/helm:3.11.0
     commands:
       - mkdir -p charts/dist
       # Find all versioned chart directories
@@ -23,7 +23,7 @@ steps:
 
   # Step 3: Push charts to Harbor
   - name: push-to-harbor
-    image: alpine/helm:latest
+    image: alpine/helm:3.11.0
     commands:
       # Fail if credentials are missing
       - "if [ -z \"$HARBOR_USERNAME\" ] || [ -z \"$HARBOR_PASSWORD\" ]; then echo \"Error: HARBOR_USERNAME or HARBOR_PASSWORD not set\"; exit 1; fi"