Merge pull request #470 from PyO3/dependabot/github_actions/pypa/cibuildwheel-2.21.1

build(deps): bump pypa/cibuildwheel from 2.20.0 to 2.21.1

Author: davidhewitt

.github/workflows/ci.yml

@@ -311,7 +311,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
         with:
           targets: aarch64-apple-darwin,x86_64-apple-darwin
-      - uses: pypa/cibuildwheel@v2.20.0
+      - uses: pypa/cibuildwheel@v2.21.1
         env:
           CIBW_BUILD: cp39-*
           CIBW_BEFORE_BUILD: >