chore: prep. for 27.0.3 release

Author: ErichDonGubler

CHANGELOG.md

@@ -40,6 +40,10 @@ Bottom level categories:
 
 ## Unreleased
 
+## v27.0.3 (2025-10-03)
+
+This release includes `naga`, `wgpu-core` and `wgpu-hal` version `27.0.3`. All other crates remain at their previous versions.
+
 #### naga
 
 - Fix a bug that resulted in the Metal error `program scope variable must reside in constant address space` in some cases. Backport of [#8311](https://github.com/gfx-rs/wgpu/pull/8311) by @teoxoy.