fix rustfmt and add changelog

Author: meowcakes

embassy-time/CHANGELOG.md

@@ -8,6 +8,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 <!-- next-header -->
 ## Unreleased - ReleaseDate
 
+- Add as_nanos and from_nanos where missing
+
 ## 0.5.0 - 2025-08-26
 
 - Allow inlining on time driver boundary

embassy-time/src/instant.rs

@@ -1,7 +1,7 @@
 use core::fmt;
 use core::ops::{Add, AddAssign, Sub, SubAssign};
 
-use super::{Duration, GCD_1K, GCD_1M, GCD_1G, TICK_HZ};
+use super::{Duration, GCD_1G, GCD_1K, GCD_1M, TICK_HZ};
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord)]
 #[cfg_attr(feature = "defmt", derive(defmt::Format))]