changelog: update to mention that closure support works for signals

CHANGELOG.md

@@ -18,7 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Allow associated constants, types and macro invocations within `impl qobject::T` blocks
 - Ensure that generated Rust code works when `#![deny(missing_docs)]` is enabled
-- Ability to connect and disconnect from signals in Rust triggering a function pointer
+- Ability to connect and disconnect from signals in Rust triggering a function pointer or closure
 - `unsafe impl !cxx_qt::Locking for qobject::T` to disable internal locking
 - `Deref` is now implemented for `qobject::T` to reach the `T` Rust struct
 - Support for C++ only methods by not having a `#[qinvokable]` attribute