chore: bump DavidAnson/markdownlint-cli2-action from 17 to 18 #3868

Job	Run time
helpers-mysql / ubuntu-latest	1m 13s
helpers-sql-obfuscation / ubuntu-latest	1m 28s
propagator-ottrace / ubuntu-latest	1m 17s
propagator-vitess / ubuntu-latest	1m 14s
propagator-xray / ubuntu-latest	1m 13s
processors-baggage / ubuntu-latest	29s
opentelemetry-resource-detector-azure / ubuntu-latest	1m 29s
opentelemetry-resource-detector-container / ubuntu-latest	1m 21s
opentelemetry-resource-detector-google_cloud_platform / ubuntu-latest	1m 34s
	11m 18s

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