Fix method name in definition

Author: zoffixznet

doc/Type/Map.pod6

@@ -177,7 +177,7 @@ Returns a C<Seq> of keys and values interleaved.
 
 Defined as:
 
-    multi method kv(Map:D: --> Seq:D)
+    multi method sort(Map:D: --> Seq:D)
 
 Returns a L<Seq> of L<Pair> objects, which are the pairs of the hash,
 sorted by key. Equivalent to C<%hash.sort: *.key>