fix double comment characters (#17484) #56421

Job	Run time
miri	12m 3s
ci	2m 53s
build (windows-latest)	11m 35s
toml	1m 59s
build (ubuntu-latest)	6m 9s
typos	5s
build (macos-latest)	5m 38s
check-bevy-internal-imports	3s
check-doc	9m 44s
check-missing-examples-in-docs	30s
run-examples-macos-metal	5m 39s
check-missing-features-in-docs	31s
markdownlint	1m 2s
check-compiles	5m 15s
check-compiles-no-std	1m 20s
build-wasm	50s
msrv	57s
build-wasm-atomics	1m 32s
	1h 7m 45s

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