Bunnymark example does not recompute its projection matrix and other parameters when the canvas size changes

[mwyrzykowski]

Description
examples/src/bunnymark/mod.rs computes an Orthographic RH matrix on page load, but if the canvas is resized, the matrix is not recomputed.

See all uses of config.width and config.height inside examples/src/bunnymark/mod.rs

Repro steps
(1) Open https://wgpu.rs/examples/?backend=webgpu&example=bunnymark in Chrome 126.0.6478.127
(2) Resize the window

Expected vs observed behavior
Observed: Bunnies bounce outside of the canvas or don't bounce to the top

Expected: bunnies bounce within the resized canvas

Extra materials

bunnies_outside_canvas.mov

Platform
macOS using Chrome Version 128.0.6562.0 (Official Build) canary (arm64)