Update deploy.yml

Author: mbucchi

.github/workflows/deploy.yml

@@ -10,8 +10,6 @@ on:
   pull_request:
     branches:
       - master
-  # trigger on release
-  release:
 
 jobs:
   build_wheels:
@@ -62,8 +60,8 @@ jobs:
   upload_pypi:
     needs: [build_wheels, build_sdist]
     runs-on: ubuntu-latest
-    # upload to PyPI on every release
-    if: github.event_name == 'release' && github.event.action == 'published'
+    # upload to PyPI on every tag starting with 'v'
+    if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags/v')
     steps:
       - uses: actions/download-artifact@v2
         with: