Corrected incorrect doc comment on read_asset_bytes #31817

Job	Run time
check-missing-examples-in-docs	57s
check-doc	8m 24s
check-bevy-internal-imports	6s
build (windows-latest)	6m 12s
ci	1m 54s
miri	9m 6s
build (ubuntu-latest)	1m 55s
run-examples-on-windows-dx12	19m 53s
build (macos-latest)	2m 58s
check-missing-features-in-docs	35s
markdownlint	1m 21s
check-compiles	4m 16s
msrv	57s
build-wasm	1m 17s
	59m 51s

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