Switch to secretless trusted publishing

.github/workflows/wheels.yml

@@ -71,6 +71,9 @@ jobs:
     name: Upload if release
     needs: merge_wheels
     runs-on: ubuntu-latest
+    permissions:
+      # IMPORTANT: this permission is mandatory for trusted publishing
+      id-token: write
     if: github.event_name == 'release' && github.event.action == 'published'
 
     steps:
@@ -81,6 +84,3 @@ jobs:
         path: dist
 
     - uses: pypa/gh-action-pypi-publish@release/v1
-      with:
-        user: __token__
-        password: ${{ secrets.pypi_password }}