feat: added trigger for merge queues

according to https://docs.github.com/en/repositories/configuring-branches-and-merges-in-your-repository/configuring-pull-request-merges/managing-a-merge-queue#triggering-merge-group-checks-with-github-actions

Author: mfranzke

.github/workflows/codeql-analysis.yml

@@ -5,6 +5,8 @@ on:
     branches: [ "main" ]
   pull_request:
     branches: [ "main" ]
+  merge_group:
+    branches: [ "main" ]
   schedule:
     - cron: '25 18 * * 0'
 

.github/workflows/default.yml

@@ -3,6 +3,7 @@ name: Default Pipeline
 
 on:
   pull_request:
+  merge_group:
   push:
     branches:
       - "main"