cancel jobs for concurrent builds in same PR

Author: vinitkumar

.github/workflows/pythonpackage.yml

@@ -2,6 +2,10 @@ name: Json2xml
 
 on: [push]
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   build:
     runs-on: ${{ matrix.os }}