fix branch name

Author: anthony-nhs

.github/workflows/pull_request.yml

@@ -113,7 +113,7 @@ jobs:
     with:
       dry_run: true
       asdfVersion: ${{ needs.get_asdf_version.outputs.asdf_version }}
-      branch_name: main
+      branch_name: ${{ github.event.pull_request.head.ref }}
       publish_package: true
       tag_format: ${{ needs.get_asdf_version.outputs.tag_format }}
     secrets: inherit