Update wgpu requirement from 0.19.3 to 0.20.0

Updates the requirements on [wgpu](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@v0.19.3...v0.20.0)

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

Signed-off-by: dependabot[bot] <support@github.com>

crates/bevy_render/Cargo.toml

@@ -70,7 +70,7 @@ codespan-reporting = "0.11.0"
 # It is enabled for now to avoid having to do a significant overhaul of the renderer just for wasm.
 # When the 'atomics' feature is enabled `fragile-send-sync-non-atomic` does nothing
 # and Bevy instead wraps `wgpu` types to verify they are not used off their origin thread.
-wgpu = { version = "0.19.3", default-features = false, features = [
+wgpu = { version = "0.20.0", default-features = false, features = [
  "wgsl",
  "dx12",
  "metal",