Update CHANGELOG.md

Author: newpavlov

crypto-common/CHANGELOG.md

@@ -15,6 +15,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 [#2309]: https://github.com/RustCrypto/traits/pull/2309
 
 ## 0.2.0 (2026-02-04) [YANKED]
+Note: this version was yanked because v0.2.1 introduces breaking changes.
+Users should migrate to v0.2.1 using `cargo update`.
+
 ### Added
 - Sealed `BlockSizes` trait implemented for types from `U1` to `U255` ([#1172])
 - `SerializableState` trait under `hazmat` module ([#1369])