use pypi trusted publishing

Author: PaulWestenthanner

.github/workflows/pypi-publish.yml

@@ -6,6 +6,8 @@ on:
 jobs:
   publish:
     runs-on: ubuntu-latest
+    permissions:
+      id-token: write  # IMPORTANT: this permission is mandatory for trusted publishing
     steps:
       - name: Clone
         uses: actions/checkout@v2