updated unit test

Author: hank-der-hafenarbeiter

src/test/compile-fail/derived-errors/issue-31997-1.rs

@@ -29,6 +29,7 @@ fn main() {
 
     let mut map = HashMap::new();
     //~^ ERROR E0433
+    //~| NOTE Use of undeclared type or module `HashMap`
 
     for line in input.lines() {
         let line = line.unwrap();