Update changelog with 1.6.0 release

Author: bentsherman

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to the nf-prov plugin will be documented here.
 
 See [Keep a Changelog](http://keepachangelog.com/) for recommendations on how to structure this file.
 
+## [1.6.0] - 2025-10-23
+
+- Bump Nextflow 25.10
+- Bump nextflow-gradle-plugin 1.0.0-beta.12
+- Track remote input files (#45)
+- Save WC_SAMPLE output in nf-prov-test as a workflow output (#52)
+
 ## [1.5.0] - 2025-09-04
 
 - Use Nextflow Gradle plugin (#42)