Fix MRO signatures

Author: moritz

lib/Type/Metamodel/Naming.pod

@@ -11,15 +11,15 @@ roles and enums.
 
 =head2 method name
 
-    method name()
+    method name($type)
 
 Returns the name of the meta object, if any.
 
     say 42.^name;       # Int
 
 =head2 method set_name
 
-    method set_name($new_name)
+    method set_name($type, $new_name)
 
 Sets the new name of the meta object.