Skip TestPyPI publishing for fork PRs

Author: noajshu

.github/workflows/dry-run-release.yml

@@ -114,11 +114,11 @@ jobs:
         twine check wheelhouse/*
 
     - name: Publish package to testpypi
+      if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository
       uses: pypa/gh-action-pypi-publish@dc37677b2e1c63e2034f94d8a5b11f265b73ba33 # v1.14.2
       with:
         repository-url: https://test.pypi.org/legacy/
         user: __token__
         password: ${{ secrets.TEST_PYPI_TOKEN }}
         packages-dir: wheelhouse/
         verbose: true
-