macos-12 runner is deprecated

See actions/runner-images#10721

Author: garfieldnate

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
           windows-latest,
           ubuntu-latest,
           # latest available X86_64 target
-          macos-12,
+          macos-14,
           # latest is ARM
           macos-latest,
         ]