Bump pypa/cibuildwheel in the actions-version group

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


Updates `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@bd033a4...d4a2945)

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

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

.github/workflows/build_wheels.yaml

@@ -50,7 +50,7 @@ jobs:
       - uses: actions/checkout@692973e3d937129bcbf40652eb9f2f61becf3332 # v4.1.7
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@bd033a44476646b606efccdd5eed92d5ea1d77ad # v2.20.0
+        uses: pypa/cibuildwheel@d4a2945fcc8d13f20a1b99d461b8e844d5fc6e23 # v2.21.1
         env:
           CIBW_BUILD: "${{ matrix.python.version }}-*"
           CIBW_TEST_REQUIRES: pytest==8.2.1 numpy==${{ matrix.python.oldest_numpy }}