Fix False-positives on “Perl 6 Types” page(dirty)

Author: tisonkun

doc/Language/objects.pod6

@@ -641,7 +641,7 @@ objects and roles are meant for managing behavior and code reuse.
 Roles are immutable as soon as the compiler parses the closing curly brace of
 the role declaration.
 
-=head2 Role Application
+=head2 Application of Role
 
 Role application differs significantly from class inheritance. When a role
 is applied to a class, the methods of that role are copied into the class.