docs: Update CHANGELOG for v0.9.8

Author: scriptacus

CHANGELOG.md

@@ -4,6 +4,13 @@ All notable changes to this project will be documented in this file.
 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).
 
+## 0.9.8 - 2026-01-09
+
+### Fixed
+- F-string lexer now handles unexpected characters gracefully during incremental editing
+- Added catch-all rules to prevent lexer state corruption when typing edge cases like `f"}"` or `f"{"`
+- Generated parser/lexer files now use consistent LF line endings on Windows
+
 ## 0.9.7 - 2026-01-07
 
 ### Added