Fix MacOS configuration errors with libobs-metal on OBS 32

Author: nhielost

cmake/macos/buildspec.cmake

@@ -20,6 +20,10 @@ function(_check_dependencies_macos)
   set(obs-studio_destination "obs-studio-VERSION")
   set(dependencies_list prebuilt qt6 obs-studio)
 
+  # Fix issue with libobs-metal configuration failure on OBS 32+ versions
+  # (see https://github.com/obsproject/obs-studio/pull/12691)
+  enable_language(Swift)
+
   _check_dependencies()
 
   execute_process(