fix broken link

Author: gfldex

doc/Language/operators.pod6

@@ -530,8 +530,8 @@ X«|postfix .^»
 =head2 postfix C«.^»
 
 A X<meta-method call>. C<$invocant.^method> calls C<method> on C<$invocant>'s
-metaclass. It desugars to C<$invocant.HOW.method($invocant, ...)>. See L<C<HOW>>
-for more information.
+metaclass. It desugars to C<$invocant.HOW.method($invocant, ...)>. See
+L<HOW|/language/mop#index-entry-syntax_HOW-HOW> for more information.
 
 Technically this is not an operator, but syntax special-cased in the compiler.