Switch macos back to cross compile, since no runner is available for arm64 image.

Author: sbrodehl

.github/workflows/cibuildwheel.yml

@@ -71,10 +71,12 @@ jobs:
     needs: [build_sdist, testing]
     name: Build wheels on ${{ matrix.os }} (${{ matrix.cibw_archs }})
     runs-on: ${{ matrix.os }}
+    env:
+      CIBW_ARCHS_MACOS: "x86_64 arm64"
     strategy:
       fail-fast: ${{ inputs.fail-fast }}
       matrix:
-        os: [ubuntu-22.04, windows-2022, macos-13, macos-13-arm64]
+        os: [ubuntu-22.04, windows-2022, macos-13]
         CIBW_ARCHS: ["auto64"]
         include:
           - os: ubuntu-22.04