update error message

Author: mununki

tests/build_tests/super_errors/expected/react_component_with_props_external.res.expected

@@ -6,4 +6,8 @@
   2 │ external make: React.element = "default"
   3 │ 
 
-  Components cannot be defined as externals when using @react.componentWithProps. Please use @react.component instead.
+  Components cannot be defined as externals when using @react.componentWithProps.
+
+If you intended to define an external for a React component using a props type,
+use the type React.component<props> instead.
+Alternatively, use @react.component for an external definition with labeled arguments.