s/BIND-POS/BIND-KEY/ for associative

Author: jonathanstowe

lib/Language/subscripts.pod

@@ -789,7 +789,7 @@ C<AT-KEY>.
 =comment When modifying this section, please also adapt the BIND-POS
          section accordingly as they are very similar.
 
-    multi method BIND-POS (::?CLASS:D: $key, \new)
+    multi method BIND-KEY (::?CLASS:D: $key, \new)
 
 Expected to bind the value or container C<new> to the slot associated with
 C<$key>, replacing any container that would be naturally found there.