CI: Run on macOS 14 (arm64) too

Author: acj

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-22.04, windows-2022, macos-13]
+        os: [ubuntu-22.04, windows-2022, macos-13, macos-14]
     steps:
     - uses: actions/checkout@v3
     - name: Build