chore: changelog entry for #9960

Author: AdrianEddy

CHANGELOG.md

@@ -80,6 +80,7 @@ Bottom level categories:
 
 - Zero-initialize padding (if any) at the end of a buffer allocation. This was application-visible in rare cases on Vulkan when a shader read beyond the valid range of a vertex buffer. By @andyleiserson in [#9791](https://github.com/gfx-rs/wgpu/pull/9791).
 - Fix required immediate slots calculation and remove `naga::valid::FunctionInfo::immediate_slots_used`. By @beicause in [#9725](https://github.com/gfx-rs/wgpu/pull/9725).
+- Fix `PendingSubmission` releasing its lock guards out of stacking order, which tripped `--cfg wgpu_validate_locks` on any submission. By @AdrianEddy in [#9960](https://github.com/gfx-rs/wgpu/pull/9960).
 
 #### naga