Update continuous-integration.yml (#1659)

Author: cspotcode

.github/workflows/continuous-integration.yml

@@ -9,6 +9,9 @@ on:
   # nightly
   schedule:
     - cron:  '0 0 * * *'
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
 jobs:
   lint-build:
     name: "Lint & Build"