Temporarily skip building wheels for Python 3.13

Python 3.13 is still in pre-release, but cibuildwheels has already
included it in the matrix. Some tests are failing on 3.13, but let's
wait to see if this is resolved by the official release before spending
time on debugging.

.github/workflows/wheels.yaml

@@ -48,7 +48,7 @@ jobs:
           CIBW_ENVIRONMENT_WINDOWS: >
             CMAKE_GENERATOR="${{ matrix.cmake_generator }}"
             CMAKE_GENERATOR_PLATFORM="${{ matrix.cmake_generator_platform }}"
-          CIBW_SKIP: pp* *-musllinux_*
+          CIBW_SKIP: pp* *-musllinux_* cp313-*
           CIBW_ARCHS: ${{ matrix.arch }}
         run: |
             python -m cibuildwheel --output-dir wheelhouse python/