gh-actions: codeql cancel out of date actions

Author: mr-c

.github/workflows/codeql-analysis.yml

@@ -8,6 +8,10 @@ on:
   schedule:
     - cron: '0 17 * * 0'
 
+concurrency:
+  group: scan-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
 jobs:
   CodeQL-Build: