Fix comment in scene example `FromResources` #29667

Job	Run time
build (windows-latest)	16m 40s
build (ubuntu-latest)	2m 34s
build (macos-latest)	7m 23s
check-bevy-internal-imports	5s
check-doc	11m 47s
check-missing-examples-in-docs	55s
ci	2m 18s
miri	7m 29s
run-examples-on-windows-dx12	27m 42s
check-missing-features-in-docs	59s
markdownlint	1m 59s
check-compiles	5m 33s
msrv	55s
build-wasm	36s
	1h 26m 55s

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