Update egui_plot requirement from 0.26 to 0.29

Updates the requirements on [egui_plot](https://github.com/emilk/egui_plot) to permit the latest version.
- [Release notes](https://github.com/emilk/egui_plot/releases)
- [Changelog](https://github.com/emilk/egui_plot/blob/main/CHANGELOG.md)
- [Commits](emilk/egui_plot@0.26.0...0.29.0)

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

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

crates/spectator/Cargo.toml

@@ -23,7 +23,7 @@ dashmap = { version = "6.0", features = ["serde"], optional = true }
 eframe = { version = "0.26", features = ["ron", "persistence"], optional = true }
 egui_dock = { version = "0.11", optional = true }
 egui_extras = { version = "0.26", optional = true }
-egui_plot = { version = "0.26", optional = true }
+egui_plot = { version = "0.29", optional = true }
 itertools = { version = "0.13", optional = true }
 rmp-serde = "1.1.1"
 serde = { version = "1.0", features = ["derive"] }