docs: add changelog for PR #971 (#977)

* chore: add changelog for PR #971

* Update changelog wording for 0.27.1

---------

Co-authored-by: app_modernization <app_modernization@example.com>
Co-authored-by: wenyt <75360946+wenytang-ms@users.noreply.github.com>

Author: 3 people

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to the "vscode-java-dependency" extension will be documented
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
+## 0.27.1
+
+- Enhancement - Update upgrade prompt after merging extension in https://github.com/microsoft/vscode-java-dependency/pull/971
+
 ## 0.27.0
 
 - feat  - Add CVE checking to notify users to fix the critical/high-severity CVE issues in https://github.com/microsoft/vscode-java-dependency/pull/948