update CHANGELOG

Author: maxulysse

CHANGELOG.md

@@ -3,6 +3,12 @@
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## dev
+
+### Enhancements & fixes
+
+- [PR #1186](https://github.com/nf-core/rnaseq/pull/1186) - Bump pipeline version to 3.16.0dev
+
 ## [[3.15.1](https://github.com/nf-core/rnaseq/releases/tag/3.15.1)] - 2024-09-16
 
 ### Enhancements & fixes