manage concurrency in push and push_pr workflows

.github/workflows/push.yml

@@ -3,11 +3,16 @@ on:
     branches:
       - main
 
-# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages
+# Cancel previous runs if a new commit is pushed to the same PR or branch
+concurrency:
+  group: ${{ github.ref }}  # Group runs by the ref (branch or PR)
+  cancel-in-progress: true  # Cancel any ongoing runs in the same group
+
+# Sets permissions of the GITHUB_TOKEN to allow deployment to GitHub Pages and modify PR labels
 permissions:
-  contents: read
-  pages: write
-  id-token: write
+  contents: read          # Read access to repository contents
+  pages: write            # Write access to GitHub Pages
+  id-token: write         # Write access to ID tokens
 
 jobs:
   style_lint:

.github/workflows/push_pr.yml

@@ -1,6 +1,11 @@
 on:
   pull_request:
 
+# Cancel previous runs if a new commit is pushed to the same PR or branch
+concurrency:
+  group: ${{ github.ref }}  # Group runs by the ref (branch or PR)
+  cancel-in-progress: true  # Cancel any ongoing runs in the same group
+
 jobs:
   build_project:
     runs-on: ubuntu-latest