Move readme updat to be a job under the release workflow

Author: CRThaze

.github/workflows/release.yaml

@@ -8,8 +8,25 @@ on:
       - charts/s3proxy/**
 
 jobs:
+  update-readme:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Render helm docs inside the README.md and push changes back to PR branch
+        uses: losisin/helm-docs-github-action@v1
+        with:
+          output-file: ../../README.md
+          template-files: README.md.gotmpl
+          git-push: true
+          git-push-user-name: "CometActions"
+          git-push-user-email: "[email protected]"
+          git-commit-message: "Update Helm documentation"
   release:
     runs-on: ubuntu-latest
+    needs:
+      - update-readme
     steps:
       - name: Checkout repository
         uses: actions/checkout@v4