update rustc-guide to rustc-dev-guide

Author: chrissimpkins

src/types/inferred.md

@@ -13,6 +13,6 @@ let x: Vec<_> = (0..10).collect();
 
 <!--
   What else should be said here?
-  The only documentation I am aware of is https://rust-lang.github.io/rustc-guide/type-inference.html
+  The only documentation I am aware of is https://rust-lang.github.io/rustc-dev-guide/type-inference.html
   There should be a broader discussion of type inference somewhere.
 -->