[MNT] ensure check_tag step gates the pypi_release workflow (#2376)

The `check_tag` step in the `pypi_release` workflow is supposed to
prevent typos in version numbers, but currently does not act as a gate
for the release.

This bug is fixed by adding the intended `needs` directive.

Author: fkiraly

.github/workflows/pypi_release.yml

@@ -34,6 +34,7 @@ jobs:
   build_wheels:
     name: Build wheels
     runs-on: ubuntu-latest
+    needs: [check_tag]
 
     steps:
       - uses: actions/checkout@v7