Update release.yml

Author: iMicknl

.github/workflows/release.yml

@@ -28,6 +28,7 @@ jobs:
       with:
         message: "Bump version to ${{ github.event.release.tag_name }}"
         add: "pyproject.toml"
+        ref: "master"
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     - name: Build and publish to PyPi