fix(ci): package chart only on changes main branch (#186)

Signed-off-by: Miguel Martinez Trivino <miguel@chainloop.dev>

Author: migmartri

.github/workflows/package_chart.yaml

@@ -3,7 +3,8 @@ name: Package Helm Chart
 on:
   # Only push Helm Chart if the deployment templates have changed
   push:
-    branch: main
+    branches:
+      - main
     paths:
       - deployment/chainloop/**