Fix CIBW_BUILD environment variable formatting

Author: kozo2

.github/workflows/wheels.yml

@@ -35,7 +35,7 @@ jobs:
         run: python -m cibuildwheel --output-dir wheelhouse
         env:
           CIBW_BUILD_VERBOSITY: 3
-          CIBW_BUILD: ""cp312-win_amd64"
+          CIBW_BUILD: "cp312-win_amd64"
           #CIBW_SKIP: "*-musllinux* *-win32"
           CIBW_BEFORE_ALL_WINDOWS: >
             C:\vcpkg\bootstrap-vcpkg.bat &&