Update CHANGELOG.md

Author: afilini

CHANGELOG.md

@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+- Update the `Database` trait to store the last sync timestamp and block height
 
 ## [v0.12.0] - [v0.11.0]
 
@@ -385,4 +386,4 @@ final transaction is created by calling `finish` on the builder.
 [v0.9.0]: https://github.com/bitcoindevkit/bdk/compare/v0.8.0...v0.9.0
 [v0.10.0]: https://github.com/bitcoindevkit/bdk/compare/v0.9.0...v0.10.0
 [v0.11.0]: https://github.com/bitcoindevkit/bdk/compare/v0.10.0...v0.11.0
-[v0.12.0]: https://github.com/bitcoindevkit/bdk/compare/v0.11.0...v0.12.0
+[v0.12.0]: https://github.com/bitcoindevkit/bdk/compare/v0.11.0...v0.12.0