ci: add merge_group (#2769)

Author: vladopajic

.github/workflows/test_all.yml

@@ -6,6 +6,7 @@ on:
       - master
   pull_request:
   workflow_dispatch:
+  merge_group:
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}

.github/workflows/test_multiformat_exts.yml

@@ -6,6 +6,7 @@ on:
       - master
   pull_request:
   workflow_dispatch:
+  merge_group:
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}