build(deps): bump pypa/cibuildwheel from 2.20 to 2.21

Bumps [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel) from 2.20 to 2.21.
- [Release notes](https://github.com/pypa/cibuildwheel/releases)
- [Changelog](https://github.com/pypa/cibuildwheel/blob/main/docs/changelog.md)
- [Commits](pypa/cibuildwheel@v2.20...v2.21)

---
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/wheel.yml

@@ -62,7 +62,7 @@ jobs:
         name: Setup QEMU
         if: matrix.platform_id == 'manylinux_aarch64' && matrix.os == 'ubuntu-latest'
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.20
+        uses: pypa/cibuildwheel@v2.21
         env:
           CIBW_ARCHS: all
           CIBW_BUILD: cp${{ matrix.python }}-${{ matrix.platform_id }}