add concurrency

Signed-off-by: Srikanth Ramakrishna  <srikanth.ramakrishna@intel.com>

Author: sramakintel

.github/workflows/apptainer-ci.yaml

@@ -18,6 +18,11 @@ on:
   push:
     branches:
       - '*/apptainer_ci_python'
+  
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   setup-build:
     runs-on: ubuntu-latest