Quickly clarify that items use dereferencing under sigil invarience

Author: skids

lib/Language/5to6.pod

@@ -183,7 +183,8 @@ name.
 
 The C<$> sigil is now always used with "item" variables (e.g. C<$name>),
 and no longer for L<array indexing|#[]_Array_indexing/slicing> and L<Hash
-indexing|#{}_Hash_indexing/slicing>.
+indexing|#{}_Hash_indexing/slicing>.  That is, you will still use C<$x[1]>
+and C<$x{"foo"}>, but you use them on C<$x>, not C<@x> or C<%x>.
 
 =head4 C<@> Array