Minor fix to github workflow

ref vs ref_name matters for projects where the tag differs from the
release name (as in '0.1' vs 'v0.1').

Author: sirosen

.github/workflows/publish_to_pypi.yaml

@@ -57,4 +57,4 @@ jobs:
         env:
           GH_TOKEN: ${{ github.token }}
           GH_REPO: ${{ github.repository }}
-        run: gh release upload "${{ github.ref }}" dist/*
+        run: gh release upload "${{ github.ref_name }}" dist/*