link from /type/Signature to /type/Pair

Author: gfldex

doc/Type/Signature.pod6

@@ -352,7 +352,7 @@ Aliases are also possible that way:
     sub paint( :color(:$colour) ) { }       # same API for the caller
 
 A function with named arguments can be called dynamically, dereferencing a
-Pair with C<|> to turn it into a named argument.
+L<Pair|/type/Pair> with C<|> to turn it into a named argument.
 
     multi f(:$named){ note &?ROUTINE.signature };
     multi f(:$also-named){ note &?ROUTINE.signature };