👷 Upload to TestPyPI on prerelease and release tags (#40)

Just upload to TestPyPI on any tag, but prevent upload to PyPI on pre-releases.

Author: weiji14

.github/workflows/ci.yml

@@ -237,7 +237,7 @@ jobs:
 
   publish-to-testpypi:
     name: Publish Python 🐍 distribution 📦 to TestPyPI
-    if: ${{ github.event_name == 'release' && github.event.action == 'prereleased' }}
+    if: startsWith(github.ref, 'refs/tags/')
     needs: [linux, windows, macos, sdist]
     runs-on: ubuntu-24.04
     environment:
@@ -264,7 +264,7 @@ jobs:
     environment:
       name: pypi
       url: https://pypi.org/project/cog3pio/
-    if: ${{ github.event_name == 'release' && github.event.action == 'released' }}
+    if: github.event.release.prerelease == false && startsWith(github.ref, 'refs/tags/')
     needs: [linux, windows, macos, sdist]
     permissions:
       id-token: write # IMPORTANT: mandatory for trusted OIDC publishing