Bump pypa/cibuildwheel from 2.20.0 to 2.21.1

Bumps [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel) from 2.20.0 to 2.21.1.
- [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...v2.21.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/build.yml

@@ -56,7 +56,7 @@ jobs:
           HOST_CCACHE_DIR="$(ccache -k cache_dir)"
           mkdir -p $HOST_CCACHE_DIR
       - name: Build wheels  # check https://cibuildwheel.readthedocs.io/en/stable/setup/#github-actions
-        uses: pypa/cibuildwheel@v2.20.0
+        uses: pypa/cibuildwheel@v2.21.1
         # to supply options, put them in 'env', like:
         # env:
         #   CIBW_SOME_OPTION: value