GA: use separate concurrency group per workflow

Author: mr-c

.github/workflows/codeql-analysis.yml

@@ -9,7 +9,7 @@ on:
     - cron: '0 10 * * 2'
 
 concurrency:
-  group: build-${{ github.event.pull_request.number || github.ref }}
+  group: codeql-${{ github.event.pull_request.number || github.ref }}
   cancel-in-progress: true
 
 jobs: