add helm package as well

Signed-off-by: Karol Szwaj <karol.szwaj@gmail.com>

Author: cnvergence

.github/workflows/image.yaml

@@ -94,3 +94,10 @@ jobs:
         package-type: 'container'
         min-versions-to-keep: 10
         delete-only-pre-release-versions: "true"
+
+    - uses: actions/delete-package-versions@e5bc658cc4c965c472efe991f8beea3981499c55 # v5.0.0
+      with:
+        package-name: 'charts/backend'
+        package-type: 'container'
+        min-versions-to-keep: 10
+        delete-only-pre-release-versions: "true"