ci: switch to trusted publishing for tket pypi (#999)

See:
https://www.maturin.rs/distribution.html#using-pypis-trusted-publishing

Author: ss2165

.github/workflows/python-wheels.yml

@@ -192,13 +192,15 @@ jobs:
     name: Release
     runs-on: ubuntu-latest
     needs: [linux, musllinux, windows, macos, sdist]
+    environment: release
+    permissions:
+      # IMPORTANT: this permission is mandatory for trusted publishing
+      id-token: write
     if: ${{ (github.event_name == 'release' && github.ref_type == 'tag' && startsWith(github.ref, 'refs/tags/tket-py-v') ) || (github.event_name == 'workflow_dispatch' && github.ref_type == 'tag' && startsWith(github.ref, 'refs/tags/tket-py-v') ) }}
     steps:
       - uses: actions/download-artifact@v4
       - name: Publish to PyPI
         uses: PyO3/maturin-action@v1
-        env:
-          MATURIN_PYPI_TOKEN: ${{ secrets.PYPI_PUBLISH_TKET2 }}
         with:
           command: upload
           args: --non-interactive --skip-existing wheels-*/*