Update cibuildwheel to 2.15.0

Author: richli

.github/workflows/cibuildwheel.yml

@@ -34,7 +34,7 @@ jobs:
         fetch-depth: 0
 
     - name: "Building ${{ matrix.os }} (${{ matrix.arch }}) wheels"
-      uses: pypa/cibuildwheel@v2.9.0
+      uses: pypa/cibuildwheel@v2.15.0
       env:
         # Skips pypy and musllinux for now.
         CIBW_SKIP: "pp* cp36-* *-musllinux*"