fix(deps): update rust crate egui_plot to 0.30

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
egui_plot	dependencies	minor	0.29 -> 0.30

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Release Notes

emilk/egui_plot (egui_plot)

v0.30.0

Compare Source

Full diff at https://github.com/emilk/egui_plot/compare/0.29.0..HEAD

PRs

• Update to egui 0.30.0, MSRV to 1.80 #​59 by @​bircni
• Allow setting a line's fill area's alpha channel #​34 by @​maxded
• Use Vec2b in parameters #​43 by @​bircni
• Fix axis thickness for multiple X or Y axes #​60 by @​raymanfx
• Fix axis labels overlap with axis ticks #​57 by @​mkalte666
• Add PlotUi::add_item(Box<dyn PlotItem>) #​51 by @​freeformstu
• Implement custom ruler color for Plot #​47 by @​gweisert

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