[chore] Fix check merge freeze job

To unblock #12043

Author: dmitryax

.github/workflows/check-merge-freeze.yml

@@ -22,9 +22,7 @@ jobs:
   check-merge-freeze:
     name: Check
     # This condition is to avoid blocking the PR causing the freeze in the first place.
-    if: |
-      (!startsWith(github.event.pull_request.title || github.event.merge_group.head_commit.message, '[chore] Prepare release')) ||
-      (github.event.pull_request.user.login || github.event.merge_group.head_commit.author.name) != 'opentelemetrybot'
+    if: (!startsWith(github.event.pull_request.title, '[chore] Prepare release')) || github.event.pull_request.user.login != 'opentelemetrybot'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2