Update changelog

Author: pinin4fjords

CHANGELOG.md

@@ -39,6 +39,7 @@ Special thanks to the following for their contributions to the release:
 - [PR #1560](https://github.com/nf-core/rnaseq/pull/1560) - General modules update, include updating subworkflows for stats fixes
 - [PR #1563](https://github.com/nf-core/rnaseq/pull/1563) - Version bumps ahead of 3.19.0 release
 - [PR #1565](https://github.com/nf-core/rnaseq/pull/1565) - Improve reproducibility with Conda
+- [PR #1567](https://github.com/nf-core/rnaseq/pull/1567) - Prerelease 3.19.0 fixes
 
 # 3.18.0 - 2024-12-19