Add `Tilde` name to `KeyCode::Grave` comment #32094

Job	Run time
build (windows-latest)	4m 42s
ci	2m 38s
miri	5m 55s
build (ubuntu-latest)	2m 2s
build (macos-latest)	2m 36s
run-examples-on-windows-dx12	12m 28s
check-bevy-internal-imports	4s
check-doc	8m 6s
check-missing-examples-in-docs	28s
check-missing-features-in-docs	45s
markdownlint	1m 43s
check-compiles	3m 28s
build-wasm	42s
msrv	1m 32s
	47m 9s

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