Fix opening PR in regenerate-target-info.yml (#1351)

Author: NobodyXu

.github/workflows/regenerate-target-info.yml

@@ -58,4 +58,4 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          gh pr create --base main --title "Update src/target/generated.rs" --body "Automatically regenerated in CI"
+          gh pr create --base main --title "Update src/target/generated.rs" --body "Automatically regenerated in CI" --head $(git branch --show-current)