ci: use merge queues

.github/workflows/bench.yml

@@ -2,8 +2,7 @@ name: Benchmark
 
 on:
   push:
-    branches:
-      - master
+    branches: [master]
 
 permissions:
   contents: read # to fetch code (actions/checkout)

.github/workflows/ci.yml

@@ -3,6 +3,8 @@ name: CI
 on:
   pull_request:
     types: [opened, synchronize, reopened]
+  merge_group:
+    types: [checks_requested]
   push:
     branches: [master]