[Changelog] Add clippy change

Author: nvzqz

CHANGELOG.md

@@ -8,6 +8,7 @@ The format is based on [Keep a Changelog] and this project adheres to
 ### Changed
 - `assert_eq_size_ptr` wraps its code inside of a closure, ensuring that the
 unsafe code inside never runs
+- Clippy no longer warns about `unneeded_field_pattern` within `assert_fields`
 
 ### Added
 - Much better documentation with test examples that are guaranteed to fail at