Enable merge queues

.github/workflows/codeql-analysis.yml

@@ -6,6 +6,8 @@ on:
   pull_request:
     # The branches below must be a subset of the branches above
     branches: [main]
+  merge_group:
+    branches: [main]
   schedule:
     - cron: '0 15 * * 4'
 
@@ -32,6 +34,10 @@ jobs:
     - run: git checkout HEAD^2
       if: ${{ github.event_name == 'pull_request' }}
 
+    # Do the same as above for merge_group event
+    - run: git checkout HEAD^2
+      if: ${{ github.event_name == 'merge_group' }}
+
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v3