Bump pypa/cibuildwheel from 2.19.1 to 2.21.1

Bumps [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel) from 2.19.1 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@v2.19.1...v2.21.1)

---
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/build.yml

@@ -77,7 +77,7 @@ jobs:
         python-version: '3.12'
 
     - name: Build wheels
-      uses: pypa/cibuildwheel@v2.19.1
+      uses: pypa/cibuildwheel@v2.21.1
       env:
         CIBW_BUILD: "cp3*"
         CIBW_ARCHS: ${{ matrix.cibw_archs }}