change doc comment code because hash() now needs to return Result

src/hash.rs

@@ -19,7 +19,7 @@ use crate::try_log;
 /// use rude::hash::*;
 /// let data = "butterflies";
 /// let salt = salt();
-/// println!("{}", hash(data, salt));
+/// println!("{}", hash(data, salt).unwrap());
 /// ```
 pub fn hash<D: Into<String>, S: Into<String>>(data: D, salt: S) -> RudeResult<String> {
 	Ok(try_log!(