Use macos-latest instead of hardcoded version number (#274)

Author: mdmathias

.github/workflows/builds.yml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-13]
+        os: [macos-latest]
 
     steps:
     - uses: actions/checkout@v3