build(deps): update bevy_egui requirement from 0.23 to 0.25

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@v0.23.0...v0.25.0)

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

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

demo/Cargo.toml

@@ -12,6 +12,6 @@ publish = false
 bevy-vello = { path = "../" }
 bevy = { workspace = true }
 bevy_pancam = { version = "0.10", features = ["bevy_egui"] }
-bevy_egui = "0.23"
+bevy_egui = "0.25"
 # FIXME: Remove later on, web-sys got angry in v0.3.38.
 web-sys = { workspace = true }