REST API: Correct description for the `humanized_updated` block direc… #19787

Job	Run time
Performance tests / Run tests	10m 9s
Performance tests (with memcached) / Run tests	10m 5s
Slack Notifications / Prepare notifications	3s
Slack Notifications / Success notifications	2s
Slack Notifications / Fixed notifications	0s
Slack Notifications / Failure notifications	0s
Slack Notifications / Cancelled notifications	0s
Failed workflow tasks	0s
	20m 19s

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