Use skip-duplicate-actions instead of concurrency limit

.github/workflows/test-webapp-build.yaml

@@ -16,12 +16,13 @@ jobs:
       run:
         working-directory: ./web
 
-    concurrency:
-      group: ${{ github.head_ref || github.run_id }}
-      cancel-in-progress: true
-
     name: Build webapp
     steps:
+      - id: skip_check
+        uses: fkirc/skip-duplicate-actions@v5
+        with:
+          concurrent_skipping: 'same_content_newer'
+          
       - name: Checkout
         uses: actions/checkout@v3
         with: