Fixes formatting issue

time/src/serde/timestamp/mod.rs

@@ -7,8 +7,8 @@
 //! [Unix timestamp]: https://en.wikipedia.org/wiki/Unix_time
 //! [with]: https://serde.rs/field-attrs.html#with
 
-pub mod milliseconds;
 pub mod microseconds;
+pub mod milliseconds;
 pub mod nanoseconds;
 
 use serde::{de, Deserialize, Deserializer, Serialize, Serializer};