fix comment

Author: gregschmit

lib/rest_framework/utils.rb

@@ -56,8 +56,9 @@ def self.get_skipped_builtin_actions(controller_class, singular)
 
   # Get the first route pattern which matches the given request.
   def self.get_request_route(application_routes, request)
-    # Prefer the route already resolved by the router, since `recognize` may fail for non-anchored
-    # routes (e.g., OPTIONS) whose `path_info` has been modified during dispatch.
+    # Prefer the route already resolved by the router to avoid an expensive `recognize` call. This
+    # is also required for Rails 8.1+ where OPTIONS routes are non-anchored, causing `path_info` to
+    # be modified during dispatch, which makes `recognize` fail from inside the controller action.
     if route = request.env["action_dispatch.route"]
       return route
     end