Update CHANGELOG

Author: Rahix

CHANGELOG.md

@@ -15,6 +15,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - ITM: add `configure` API (#342).
 - TPIU: add API for *Formatter and Flush Control* (FFCR) and *Selected Pin Control* (SPPR) registers (#342).
 - Add `std` and `serde` crate features for improved host-side ITM decode functionality when working with the downstream `itm`, `cargo-rtic-scope` crates (#363, #366).
+- Added the ability to name the statics generated by `singleton!()` for better debuggability (#364, #380).
+
+### Fixed
+- Fixed `singleton!()` statics sometimes ending up in `.data` instead of `.bss` (#364, #380).
 
 ## [v0.7.4] - 2021-12-31