ci: bump pypa/cibuildwheel from 2.19 to 2.20 in the actions group

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


Updates `pypa/cibuildwheel` from 2.19 to 2.20
- [Release notes](https://github.com/pypa/cibuildwheel/releases)
- [Changelog](https://github.com/pypa/cibuildwheel/blob/main/docs/changelog.md)
- [Commits](pypa/cibuildwheel@v2.19...v2.20)

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

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

.github/workflows/pypi.yml

@@ -48,7 +48,7 @@ jobs:
         with:
           platforms: ${{matrix.qemu_arch}}
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.19
+        uses: pypa/cibuildwheel@v2.20
         env:
           CIBW_ARCHS: ${{matrix.cibw_arch}}
           CIBW_TEST_SKIP: "*-*linux_aarch64 *-macosx_x86_64"