Add `Tilde` name to `KeyCode::Grave` comment #32095

Job	Run time
miri	5m 49s
ci	1m 27s
check-bevy-internal-imports	6s
build (windows-latest)	4m 35s
check-missing-examples-in-docs	46s
check-doc	4m 38s
build (ubuntu-latest)	3m 47s
run-examples-on-windows-dx12	13m 45s
build (macos-latest)	3m 18s
check-missing-features-in-docs	54s
check-compiles	2m 13s
markdownlint	1m 13s
build-wasm	49s
msrv	1m 2s
	44m 22s

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