fix(traits3): grammar mistake in the hint for traits3

Author: raymon-roos

info.toml

@@ -808,7 +808,7 @@ mode = "test"
 hint = """
 Traits can have a default implementation for functions. Structs that implement
 the trait can then use the default version of these functions if they choose not
-implement the function themselves.
+to implement the function themselves.
 
 See the documentation at: https://doc.rust-lang.org/book/ch10-02-traits.html#default-implementations
 """