fixup! Run macOS tests on ARM

Author: jmert

.github/workflows/CI.yml

@@ -28,19 +28,11 @@ jobs:
           - 'min'     # earliest supported
           - '1'       # latest release
           - 'nightly'
-        os:
-          - ubuntu-latest
-          - macOS-latest
+        os: ubuntu-latest
+        arch: [ 'x86', 'x64' ]
         include:
-          - os: ubuntu-latest
-            arch: x86
-          - os: ubuntu-latest
-            arch: x64
-          - os: macOS-latest
-            arch: arm64
-        exclude:
-          - os: macOS-latest
-            version: min
+          - { os: macOS-latest, arch: arm64, version: '1' }
+          - { os: macOS-latest, arch: arm64, version: 'nightly' }
     steps:
       - uses: actions/checkout@v6
       - uses: julia-actions/setup-julia@v3