Updated the 2D examples to make them uniform #56552

Job	Run time
check-doc	11m 20s
ci	3m 33s
miri	14m 13s
build (windows-latest)	12m 37s
run-examples-macos-metal	5m 20s
build (ubuntu-latest)	6m 48s
typos	6s
toml	2m 0s
build (macos-latest)	5m 4s
check-bevy-internal-imports	5s
check-missing-examples-in-docs	29s
check-missing-features-in-docs	31s
markdownlint	1m 3s
check-compiles	6m 40s
check-compiles-no-std	2m 1s
build-wasm-atomics	1m 40s
msrv	1m 19s
build-wasm	1m 17s
	1h 16m 6s

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