Update CHANGELOG.md based on suggestion

CHANGELOG.md

@@ -123,7 +123,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Fix detection of Chrome's version on Darwin during CI ([#3296](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3296))
 - Upgrade yarn version to be compatible with @openearch-project/opensearch ([#3443](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3443))
 - [CI] Reduce redundancy by using matrix strategy on Windows and Linux workflows ([#3514](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3514))
-- Adds achievement workflow ([#3721](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3721))
+- Add an achievement badger to the PR ([#3721](https://github.com/opensearch-project/OpenSearch-Dashboards/pull/3721))
 
 ### 📝 Documentation