Update the `wgpu` example runner to `0.19` #2977

Job	Run time
cargo-deny	58s
Test (ubuntu-20.04-16core, x86_64-unknown-linux-gnu)	3m 28s
Lint	2m 39s
Test (windows-2022-16core, x86_64-pc-windows-msvc)	5m 45s
Test (macOS-latest-xl, x86_64-apple-darwin)	6m 59s
Test (ubuntu-20.04-16core, aarch64-linux-android)	3m 27s
	23m 16s

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