Simplify CHANGELOG entry for diagnostics.severity

Author: claude

CHANGELOG.md

@@ -20,7 +20,7 @@ and this project attempts to adhere to [Semantic Versioning](https://semver.org/
 
 ### Added
 
-- Added `diagnostics.severity` configuration for fine-grained control over diagnostic behavior with support for prefix matching and severity levels (off, hint, info, warning, error)
+- Added `diagnostics.severity` configuration option for configuring diagnostic severity levels
 - Added `pythonpath` configuration option for specifying additional Python import paths
 - Added documentation for VS Code extension
 - Added documentation for Zed extension