.github/workflows/charts-release.yaml: small changes

.github/workflows/charts-release.yaml

@@ -1,6 +1,8 @@
+---
 name: Release Charts
 
 on:
+  workflow_dispatch:
   push:
     branches:
       - main
@@ -15,7 +17,8 @@ jobs:
     # see: https://docs.github.com/en/actions/security-guides/automatic-token-authentication#modifying-the-permissions-for-the-github_token
     permissions:
       contents: write
-    runs-on: ubuntu-latest
+    if: "!contains(github.event.head_commit.message, '[ci-skip]')"
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v4