disable Publish action for main push

Author: kangreon

.github/workflows/main.yaml

@@ -48,7 +48,7 @@ jobs:
 #        repository_url: https://test.pypi.org/legacy/
 #        skip_existing: true
     - name: Publish package to PyPI (only if pushing a tag)
-#      if: startsWith(github.ref, 'refs/tags')
+      if: startsWith(github.ref, 'refs/tags')
       uses: pypa/gh-action-pypi-publish@release/v1
       with:
         password: ${{ secrets.PYPI_API_TOKEN }}