Update bevy_egui requirement from 0.28 to 0.29

Updates the requirements on [bevy_egui](https://github.com/mvlabat/bevy_egui) to permit the latest version.
- [Release notes](https://github.com/mvlabat/bevy_egui/releases)
- [Changelog](https://github.com/mvlabat/bevy_egui/blob/main/CHANGELOG.md)
- [Commits](mvlabat/bevy_egui@v0.28.0...v0.29.0)

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

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

Cargo.toml

@@ -48,7 +48,7 @@ leafwing_input_manager_macros = { path = "macros", version = "0.15" }
 bevy = { version = "0.14.0-rc.3", default-features = false, features = [
   "serialize",
 ] }
-bevy_egui = { version = "0.28", optional = true }
+bevy_egui = { version = "0.29", optional = true }
 
 derive_more = { version = "0.99", default-features = false, features = [
   "display",