Merge release related workflows in one file

Signed-off-by: Yi Chen <[email protected]>

.github/workflows/release-charts.yaml

@@ -2,7 +2,8 @@ name: Release Helm charts
 
 on:
   release:
-    types: [published]
+    types:
+      - published
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -12,7 +13,9 @@ jobs:
   build:
     permissions:
       contents: write
+
     runs-on: ubuntu-latest
+
     steps:
       - name: Checkout source code
         uses: actions/checkout@v4
@@ -22,6 +25,11 @@ jobs:
           git config user.name "$GITHUB_ACTOR"
           git config user.email "[email protected]"
 
+      - name: Read version from VERSION file
+        run: |
+          VERSION=$(cat VERSION)
+          echo "VERSION=${VERSION}" >> $GITHUB_ENV
+
       - name: Set up Helm
         uses: azure/[email protected]
         with:
@@ -52,7 +60,7 @@ jobs:
         env:
           CHART_URL: https://github.com/${{ github.repository }}/releases/download/${{ github.ref_name }}
         run: |
-          helm repo index --merge index.yaml --url $CHART_URL .
+          helm repo index --merge index.yaml --url ${CHART_URL} .
           git add index.yaml
-          git commit -s -m "Update index.yaml" || exit 0
+          git commit -s -m "Update Helm repo index for Spark operator chart version ${VERSION}" || exit 0
           git push