chore(deps): update bevy_egui requirement from 0.25 to 0.26

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@v0.25.0...v0.26.0)

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

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

demos/painting-client/Cargo.toml

@@ -9,7 +9,7 @@ publish = false
 bevy = { workspace = true, default-features = true }
 bevy_rtc = { path = "../../bevy_rtc", features = ["client"] }
 protocol = { path = "../protocol" }
-bevy_egui = "0.25"
+bevy_egui = "0.26"
 log = { version = "0.4", default-features = false }
 
 ## FIXME: Remove this after https://github.com/bevyengine/bevy/issues/11052