Minor change

crates/storage/src/rocksdb.rs

@@ -45,7 +45,7 @@ fn nanoseconds_with_random() -> u128 {
 
     let ts = std::time::SystemTime::now()
         .duration_since(std::time::UNIX_EPOCH)
-        .unwrap()
+        .expect("time")
         .as_nanos();
 
     ts.checked_add(random_number).unwrap_or(ts)