add changelog entry

Author: teoxoy

CHANGELOG.md

@@ -53,7 +53,10 @@ Bottom level categories:
 +pub struct Dx12BackendOptions { pub shader_compiler: Dx12Compiler, pub presentation_system: Dx12PresentationSystem }
 ```
 
-#### Naga
+#### General
+
+- Add support for rendering to slices of 3D texture views and single layered 2D-Array texture views (this requires `VK_KHR_maintenance1` which should be widely available on newer drivers). By @teoxoy in [#7596](https://github.com/gfx-rs/wgpu/pull/7596)
+  > > > > > > > 6a7aa14fb (add changelog entry)
 
 ### Bug Fixes