Merge pull request #229976 from Homebrew/pr-publish-branch

workflows: use `--branch=main` for `brew pr-publish`

Author: carlocab

.github/workflows/automerge-from-merge-queue.yml

@@ -264,7 +264,7 @@ jobs:
           cask: false
           test-bot: false
 
-      - run: brew pr-publish "$PR"
+      - run: brew pr-publish --branch=main "$PR"
         env:
           HOMEBREW_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           PR: ${{ needs.status-check.outputs.pull-number }}

.github/workflows/automerge.yml

@@ -194,7 +194,7 @@ jobs:
           cask: false
           test-bot: false
 
-      - run: brew pr-publish "$PR"
+      - run: brew pr-publish --branch=main "$PR"
         env:
           HOMEBREW_GITHUB_API_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           PR: ${{ needs.status-check.outputs.pull-number }}