Update CONTRIBUTING.md with comment automation policy #35620

Job	Run time
typecheck	39s
knip	29s
format	22s
self-check	52s
misc	28s
coverage	11m 32s
baselines	9m 18s
Test Node 24 on windows-latest	10m 30s
smoke	52s
Test Node 24 on ubuntu-latest	8m 31s
Test Node 14 on windows-latest	14m 27s
lint	55s
Test Node 14 on ubuntu-latest	11m 54s
browser-integration	1m 34s
package-size	1m 29s
Test Node lts/* on ubuntu-latest with --no-bundle	10m 38s
required	4s
	1h 24m 34s

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