Build macos wheels on intel

Author: dstansby

.github/workflows/wheel.yaml

@@ -13,14 +13,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest, windows-latest, macos-12]
     env:
       CIBW_TEST_COMMAND: python -c "import numcodecs"
       CIBW_SKIP: "pp* cp36-* *-musllinux_* *win32 *_i686 *_s390x"
       CIBW_ARCHS_MACOS: 'x86_64 arm64'
       CIBW_TEST_SKIP: '*-macosx_arm64'
       # note: CIBW_ENVIRONMENT is now set in pyproject.toml
-      
+
     steps:
       - uses: actions/checkout@v4
         with: