ci: Build Apple Silicon wheels natively

.github/workflows/cibuildwheel.yml

@@ -116,9 +116,6 @@ jobs:
       CIBW_SKIP: "*-musllinux_aarch64"
       CIBW_TEST_COMMAND: >-
         python {package}/ci/check_version_number.py
-      # Apple Silicon machines are not available for testing, so silence the
-      # warning from cibuildwheel. Remove the skip when they're available.
-      CIBW_TEST_SKIP: "*-macosx_arm64"
       MACOSX_DEPLOYMENT_TARGET: "10.12"
       MPL_DISABLE_FH4: "yes"
     strategy:
@@ -131,7 +128,9 @@ jobs:
           - os: windows-latest
             cibw_archs: "auto64"
           - os: macos-11
-            cibw_archs: "x86_64 arm64"
+            cibw_archs: "x86_64"
+          - os: macos-14
+            cibw_archs: "arm64"
 
     steps:
       - name: Set up QEMU