Update rust.yml

Related to #21295 (comment)

Author: blaginin

.github/workflows/rust.yml

@@ -38,7 +38,6 @@ on:
       - "**.md"
       - ".github/ISSUE_TEMPLATE/**"
       - ".github/pull_request_template.md"
-  merge_group:
   # manual trigger
   # https://docs.github.com/en/actions/managing-workflow-runs/manually-running-a-workflow
   workflow_dispatch: