Bump pypa/cibuildwheel from 2.7.0 to 2.8.1

Bumps [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel) from 2.7.0 to 2.8.1.
- [Release notes](https://github.com/pypa/cibuildwheel/releases)
- [Changelog](https://github.com/pypa/cibuildwheel/blob/main/docs/changelog.md)
- [Commits](pypa/cibuildwheel@v2.7.0...v2.8.1)

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

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/test.yml

@@ -191,7 +191,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v3
-      - uses: pypa/cibuildwheel@v2.7.0
+      - uses: pypa/cibuildwheel@v2.8.1
       - uses: actions/upload-artifact@v3
         with:
           name: wheels