Revert excessive changelog modifications

CHANGELOG.md

@@ -4,15 +4,5 @@
 
 ## [Unreleased]
 
-## [0.2.0]
- - Add `.typeql` to supported extensions.
- - Update TypeQL grammar based on the recent official releases.
- - Improve syntax highlighting, coloring, and referencing.
- - Add TypeDB Studio's color schemes available for import (check out the [official GitHub repo](https://github.com/typedb-osi/typeql-plugin-jetbrains)).
- - Fix incorrect syntax error highlighting.
- - Enhance referencing, including override constraints like `owns as`, `plays as`, `relates as`.
- - Improve `Go To Declaration` and `Find Usages` features work.
- - Fix `Rename` feature and a set of errors connected to it.
-
 ## [0.1.1]
  - Add basic TypeQL support for `.tql` files.