Fix typo in E0433 docs

Author: felixrabe

src/librustc_resolve/diagnostics.rs

@@ -1256,7 +1256,7 @@ let map = HashMap::new();
 ```
 
 Please verify you didn't misspell the type/module's name or that you didn't
-forgot to import it:
+forget to import it:
 
 
 ```