Fix typo in changelog

Author: cirras

CHANGELOG.md

@@ -51,7 +51,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - False positives on enumerator property `Current` in `UnusedProperty`.
 - False positives on enums that are never referenced by name (but have used values) in `UnusedType`.
 - Name resolution failures in legacy initialization sections referencing the implementation section.
-- Name resolution failures whena accessing ancestors of enclosing types from nested type methods.
+- Name resolution failures when accessing ancestors of enclosing types from nested type methods.
 - Name resolution failures on invocations of methods with generic open array parameters.
 - Name resolution failures around `Create` calls on types with `constructor` constraints.
 - Incorrect file position calculation for multiline string tokens.