build(deps): bump the winit group with 1 update

Bumps the winit group with 1 update: [winit](https://github.com/rust-windowing/winit).

- [Release notes](https://github.com/rust-windowing/winit/releases)
- [Changelog](https://github.com/rust-windowing/winit/blob/master/CHANGELOG.md)
- [Commits](rust-windowing/winit@v0.27.5...v0.28.6)

---
updated-dependencies:
- dependency-name: winit
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: winit
...

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

Cargo.toml

@@ -26,7 +26,7 @@ piston_window = { version = "0.130.0", optional = true }
 
 # backend_pixels
 pixels = { version = "0.10.0", optional = true }
-winit = { version = "0.27.5", optional = true }
+winit = { version = "0.28.6", optional = true }
 winit_input_helper = { version = "0.13.0", optional = true }
 
 anyhow = "1.0.75"