Update date in CHANGELOG

Author: drpatelh

CHANGELOG.md

@@ -3,7 +3,7 @@
 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).
 
-## [[3.11.1](https://github.com/nf-core/rnaseq/releases/tag/3.11.1)] - 2023-03-30
+## [[3.11.1](https://github.com/nf-core/rnaseq/releases/tag/3.11.1)] - 2023-03-31
 
 ### Credits