Update build.yml

Author: jcs090218

.github/workflows/build.yml

@@ -9,6 +9,10 @@ on:
       - master
   workflow_dispatch:
 
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
 jobs:
   dist:
     runs-on: [ubuntu-latest]