fix ci:

src/risparser/paragraph/mod.rs

@@ -46,8 +46,9 @@ fn fetch(url: &str) -> Result<String, Error> {
 #[cfg(test)]
 fn fetch(url: &str) -> Result<String, Error> {
     use std::{
+        collections::hash_map::DefaultHasher,
         fs,
-        hash::{DefaultHasher, Hash, Hasher},
+        hash::{Hash, Hasher},
     };
 
     let mut hasher = DefaultHasher::new();