Fix workflow

Author: kostrykin

.github/workflows/pull_upstream.yml

@@ -61,6 +61,6 @@ jobs:
         if: steps.commit.outcome == 'success'
         shell: bash
         run: |
-          gh pr create --fill --head pull_upstream
+          gh pr create --fill --base ${{ github.ref_name }} --head pull_upstream
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}