fix Result.map_err

platform/main.roc

@@ -51,7 +51,7 @@ main_for_host! = \raw_args ->
                 Program exited with error:
                     ${Inspect.to_str(msg)}
 
-                Tip: If you do not want to exit on this error, use `Result.map_err` to handle the error. Docs for `Result.map_err`: <https://www.roc-lang.org/builtins/Result#mapErr>
+                Tip: If you do not want to exit on this error, use `Result.map_err` to handle the error. Docs for `Result.map_err`: <https://www.roc-lang.org/builtins/Result#map_err>
                 """
 
             _ = Stderr.line!(help_msg)