Bump pypa/cibuildwheel from 2.14 to 2.15

Bumps [pypa/cibuildwheel](https://github.com/pypa/cibuildwheel) from 2.14 to 2.15.
- [Release notes](https://github.com/pypa/cibuildwheel/releases)
- [Changelog](https://github.com/pypa/cibuildwheel/blob/main/docs/changelog.md)
- [Commits](pypa/cibuildwheel@v2.14...v2.15)

---
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/wheels.yml

@@ -88,7 +88,7 @@ jobs:
           rsync -azv gsl/lib/ /usr/local/lib/
           echo "REPAIR_LIBRARY_PATH=/usr/local/lib/" >> $GITHUB_ENV # https://github.com/pypa/cibuildwheel/issues/816#issuecomment-916197079
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.14
+        uses: pypa/cibuildwheel@v2.15
         env:
           CIBW_BUILD: ${{ matrix.python }}-${{ matrix.buildplat[1] }}_${{ matrix.buildplat[2] }}
           CIBW_BUILD_VERBOSITY: 1