ci: Migrate from 'macos-13' to 'macos-latest' image

Author: psyGamer

.github/workflows/Build.CelesteStudio.yml

@@ -177,7 +177,7 @@ jobs:
 
   build-mac:
     name: macOS
-    runs-on: macos-13
+    runs-on: macos-latest
 
     needs: cache
     if: needs.cache.outputs.macos_cache_hit != 'true'