fix typo

Author: coke

doc/Language/functions.pod6

@@ -222,7 +222,7 @@ type:
     say as-json([True, 42]);    # [true, 42]
 
 Named parameters participate in the dispatch even if they are not provided in
-the call. Therefore a multi candidate with named will be given precedece.
+the call. Therefore a multi candidate with named will be given precedence.
 
 C<multi> without any specific routine type always defaults to a C<sub>, but you
 can use it on methods as well. The candidates are all the multi methods of the