Update changelog

Author: bwestlin

proto-gen/CHANGELOG.md

@@ -9,6 +9,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 <!-- next-header -->
 ## [Unreleased] - ReleaseDate
+- Update dependency `anstream` to `0.6.15` for advisory: <https://rustsec.org/advisories/RUSTSEC-2024-0404>
+- Build fixes that prevented v `0.2.9` from being fully released
 ## [0.2.9] - 2025-01-16
 - [PR#27](https://github.com/EmbarkStudios/proto-gen/pull/27) Added `--prepend-header-file` option for specifying a file which will be prepended as a header in generated source files.
 ## [0.2.8] - 2024-10-24