clippy: Fix remaining doc_markdown lints. (#509)

.clippy.toml

@@ -1 +1 @@
-doc-valid-idents = ["WebGPU", "PostScript", ".."]
+doc-valid-idents = ["MotionMark", "WebGPU", "PostScript", ".."]

examples/simple/src/main.rs

@@ -186,7 +186,7 @@ fn create_winit_window(event_loop: &winit::event_loop::EventLoopWindowTarget<()>
     )
 }
 
-/// Helper function that creates a vello Renderer for a given RenderContext and Surface
+/// Helper function that creates a vello `Renderer` for a given `RenderContext` and `RenderSurface`
 fn create_vello_renderer(render_cx: &RenderContext, surface: &RenderSurface) -> Renderer {
     Renderer::new(
         &render_cx.devices[surface.dev_id].device,

examples/with_winit/src/multi_touch.rs

@@ -1,7 +1,7 @@
 // Copyright 2021 the egui Authors and the Vello Authors
 // SPDX-License-Identifier: Apache-2.0 OR MIT
 
-/// Adapted from https://github.com/emilk/egui/blob/212656f3fc6b931b21eaad401e5cec2b0da93baa/crates/egui/src/input_state/touch_state.rs
+/// Adapted from <https://github.com/emilk/egui/blob/212656f3fc6b931b21eaad401e5cec2b0da93baa/crates/egui/src/input_state/touch_state.rs>
 use std::{collections::BTreeMap, fmt::Debug};
 
 use vello::kurbo::{Point, Vec2};