Update CHANGELOG.md

Author: pinin4fjords

CHANGELOG.md

@@ -33,6 +33,7 @@ Special thanks to the following for their contributions to the release:
 - [PR #1141](https://github.com/nf-core/rnaseq/pull/1141) - Important! Template update for nf-core/tools v2.11
 - [PR #1149](https://github.com/nf-core/rnaseq/pull/1149) - Fix and patch version commands for Fastp, FastQC and UMI-tools modules ([#1103](https://github.com/nf-core/rnaseq/issues/1103))
 - [PR #1144](https://github.com/nf-core/rnaseq/pull/1144) - Interface to kmer size for pseudoaligners
+- [PR #1150](https://github.com/nf-core/rnaseq/pull/1150) - Be more flexible on attribute values in GTFs
 
 ## [[3.13.2](https://github.com/nf-core/rnaseq/releases/tag/3.13.2)] - 2023-11-21