test: only push packages if on release

Author: alvarolopez

.github/workflows/packaging.yml

@@ -66,8 +66,7 @@ jobs:
           name: caso-${{ env.VERSION }}.tar.gz
 
       - name: Update source distribution artifacts to release
-        # Also run if event is a tag
-        if: github.event_name == 'push' || github.event_name == 'release'
+        if: github.event_name == 'release'
         uses: AButler/[email protected]
         with:
           files: 'dist/*tar.gz'