Preserve Helm chart museum: keep_files and shared concurrency group

.github/workflows/publish-helm.yml

@@ -6,6 +6,10 @@ on:
       - main
   workflow_dispatch:
 
+concurrency:
+  group: deploy-gh-pages
+  cancel-in-progress: true
+
 permissions:
   contents: write
 

.github/workflows/publish-hugo.yml

@@ -40,6 +40,5 @@ jobs:
           publish_dir: ./hugo-output
           publish_branch: gh-pages
           destination_dir: docs
-          keep_files: false
-          force_orphan: true
+          keep_files: true
           cname: blog.xsltplayground.com