TEMP: Update cibuildwheel version

This will cause cothread to start building using more modern manylinux
versions

Author: AlexanderWells-diamond

.github/workflows/code.yml

@@ -72,12 +72,10 @@ jobs:
           pipx run build --sdist
 
       - name: Build wheels
-        uses: pypa/cibuildwheel@v2.16.2
+        uses: pypa/cibuildwheel@v4.3.5
         with:
           output-dir: dist
         env:
-          # Force using an older manylinux image to support more OSs
-          CIBW_MANYLINUX_X86_64_IMAGE: manylinux2014
           # Simple test that the wheel is loaded and available
           CIBW_TEST_COMMAND: python -c "import cothread; print(cothread.__version__)"
           # Skip all PyPy wheels (GIL deadlock detected in ThreadState_New)