fix: remove extra " typo in info.toml

Author: Claire Wang

info.toml

@@ -746,7 +746,7 @@ path = "exercises/quiz3.rs"
 mode = "test"
 hint = """
 To find the best solution to this challenge you're going to need to think back to your
-knowledge of traits, specifically Trait Bound Syntax -  you may also need this: "use std::fmt::Display;""""
+knowledge of traits, specifically Trait Bound Syntax -  you may also need this: `use std::fmt::Display;`."""
 
 # TESTS