Add PR Rust-SDL2#1403 to changelog

Done as a seperate commit since it needs to reference the PR number.

Author: lolbinarycat

changelog.md

@@ -3,6 +3,8 @@ when upgrading from a version of rust-sdl2 to another.
 
 ### Unreleased
 
+[PR #1403](https://github.com/Rust-SDL2/rust-sdl2/pull/1403) Support converting arrays of integers to Rect via TryFrom.
+
 [PR #1368](https://github.com/Rust-SDL2/rust-sdl2/pull/1368) Remove unnecessary unsafe in Window interface. Make Window `Clone`.
 
 [PR #1366](https://github.com/Rust-SDL2/rust-sdl2/pull/1366) Add Primary Selection bindings.