Fix typo

Author: camelid

src/attributes/limits.md

@@ -29,7 +29,7 @@ a!{}
 ```rust,compile_fail
 #![recursion_limit = "1"]
 
-// This fails because it requires two recursive steps to auto-derefence.
+// This fails because it requires two recursive steps to auto-dereference.
 (|_: &u8| {})(&&&1);
 ```