Update egui_extras requirement from 0.27.2 to 0.28.1

Updates the requirements on [egui_extras](https://github.com/emilk/egui) to permit the latest version.
- [Release notes](https://github.com/emilk/egui/releases)
- [Changelog](https://github.com/emilk/egui/blob/master/CHANGELOG.md)
- [Commits](emilk/egui@0.27.2...0.28.1)

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

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

Cargo.toml

@@ -36,7 +36,7 @@ semver = "1.0.22"
 eframe = { version = "0.27.2", features = ["wgpu"] }
 egui = "0.27.2"
 egui-notify = "0.14.0"
-egui_extras = { version = "0.27.2", features = ["syntect", "image"] }
+egui_extras = { version = "0.28.1", features = ["syntect", "image"] }
 image = "0.25.1"
 open = "5.1.2"
 ping = "0.5.2"