Bump pypa/cibuildwheel from 2.20.0 to 2.21.0 in the actions group (#258)

Bumps the actions group with 1 update: [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel).


Updates `pypa/cibuildwheel` from 2.20.0 to 2.21.0
- [Release notes](https://github.com/pypa/cibuildwheel/releases)
- [Changelog](https://github.com/pypa/cibuildwheel/blob/main/docs/changelog.md)
- [Commits](pypa/cibuildwheel@v2.20.0...v2.21.0)

---
updated-dependencies:
- dependency-name: pypa/cibuildwheel
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/wheels.yml

@@ -47,7 +47,7 @@ jobs:
       with:
         platforms: all
 
-    - uses: pypa/cibuildwheel@v2.20.0
+    - uses: pypa/cibuildwheel@v2.21.0
       env:
         CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
         CIBW_BUILD: ${{ matrix.python-version }}*