Update .github/workflows/build_and_test_mac.yml

Co-authored-by: Copilot <[email protected]>

Author: sameeul

.github/workflows/build_and_test_mac.yml

@@ -7,7 +7,7 @@ on:
   workflow_dispatch:
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.sha }}
   cancel-in-progress: true
 
 env: