Add concurrency controls to prevent concurrent workflow runs on same branch

Co-authored-by: rajbos <6085745+rajbos@users.noreply.github.com>

Author: Copilot

.github/workflows/deploy-to-pages.yml

@@ -16,9 +16,9 @@ permissions:
   pages: write
   id-token: write
 
-# Allow only one concurrent deployment
+# Allow only one concurrent deployment per branch
 concurrency:
-  group: "pages"
+  group: "pages-${{ github.head_ref || github.ref }}"
   cancel-in-progress: true
 
 jobs:

.github/workflows/deploy.yml

@@ -5,6 +5,11 @@ on:
     branches:
       - main
 
+# Allow only one concurrent deployment per branch
+concurrency:
+  group: "deploy-${{ github.ref }}"
+  cancel-in-progress: true
+
 permissions:
   contents: write
 

.github/workflows/publish.yml

@@ -4,6 +4,11 @@ on:
   release:
     types: [created]
 
+# Allow only one concurrent release build
+concurrency:
+  group: "publish-${{ github.ref }}"
+  cancel-in-progress: true
+
 jobs:
   build-and-publish:
     runs-on: ubuntu-latest