Update CHANGELOG.md

Author: ashishexee

CHANGELOG.md

@@ -5,7 +5,7 @@ All notable changes to the "LeetCode Test Case Manager" extension will be docume
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## modifications #1
+## Modifications #1
 
 ### Added
 - New command "Get Solution File Directory" to copy solution file path