Update CHANGELOG

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+- [#889]: Add script for book hosting
 - [#884]: Upgrade dependencies: notify is now at v7, thiserror is now at v2 
 - [#883]: Mark decoder and parser not as unstable anymore
 - [#880]: Merge function calls emitted by the macro to save space.
@@ -28,6 +29,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 - [#822]: `CI`: Run `cargo semver-checks` on every PR
 - [#807]: `defmt-print`: Add `watch_elf` flag to allow ELF file reload without restarting `defmt-print`
 
+[#889]: https://github.com/knurling-rs/defmt/pull/889
 [#884]: https://github.com/knurling-rs/defmt/pull/884
 [#883]: https://github.com/knurling-rs/defmt/pull/883
 [#880]: https://github.com/knurling-rs/defmt/pull/880