Also update changelog

Author: echatman

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Added `unique_skipped_as_duplicate` attributes to otel `insert_many` spans and `insert_count` metric. [PR #58](https://github.com/riverqueue/rivercontrib/pull/58).
+
 ## [0.8.0] - 2026-05-15
 
 ### Added