Update naga requirement from 0.19.0 to 0.20.0

Updates the requirements on [naga](https://github.com/gfx-rs/wgpu) to permit the latest version.
- [Release notes](https://github.com/gfx-rs/wgpu/releases)
- [Changelog](https://github.com/gfx-rs/wgpu/blob/trunk/CHANGELOG.md)
- [Commits](gfx-rs/wgpu@v0.19.0...v0.20.0)

---
updated-dependencies:
- dependency-name: naga
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

rend3-routine/Cargo.toml

@@ -20,7 +20,7 @@ encase = { version = "0.7", features = ["glam"] }
 flume = "0.11"
 glam = { version = "0.25.0", features = ["bytemuck"] }
 log = "0.4"
-naga = { version = "0.19.0", features = ["wgsl-in"] }
+naga = { version = "0.20.0", features = ["wgsl-in"] }
 ordered-float = "4"
 parking_lot = "0.12"
 profiling = {version = "1", default-features = false }