Fix implementatoins links on traits item page
@@ -121,3 +121,4 @@ let nonsense = mycircle.radius() * mycircle.area();
[RFC 255]: https://github.com/rust-lang/rfcs/blob/master/text/0255-object-safety.md
[associated items]: items/associated-items.html
[method]: items/associated-items.html#methods
+[implementations]: items/implementations.html
\ No newline at end of file
