fix: Update .github/workflows/core-smart-contract-ci.yml

Co-authored-by: Zied Guesmi <26070035+zguesmi@users.noreply.github.com>

Author: gfournieriExec

.github/workflows/core-smart-contract-ci.yml

@@ -14,6 +14,10 @@ on:
         type: number
         default: 20
 
+concurrency:
+  group: ${{ github.ref }}-core-smart-contract-ci
+  cancel-in-progress: true
+  
 jobs:
   build-and-test:
     runs-on: ubuntu-latest