Update changelog

CHANGELOG.md

@@ -13,6 +13,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Breaking Changes
 
+- Remove the `dat` intermediary directory in file storage ([#39][])
 - Add `delete_app_keys` and `delete_auth_keys` syscalls. ([#33][])
 
   - `delete_all_pins` now doesn't affect application keys
@@ -22,6 +23,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   Applications (trussed-secrets) relying on the old `delete_all_pins` behaviour will need to be fixed.
 
 [#33]: https://github.com/trussed-dev/trussed-auth/pull/33
+[#39]: https://github.com/trussed-dev/trussed-auth/pull/39
 [Unreleased]: https://github.com/trussed-dev/trussed-auth/compare/v0.2.2...HEAD
 
 ## [0.2.2][] - 2023-04-26