Customize: Update input_attrs docs for the textarea control. #42381

Job	Run time
Check PHP compatibility / Run compatibility checks	22s
Slack Notifications / Prepare notifications	4s
Slack Notifications / Success notifications	5s
Slack Notifications / Failure notifications	-1s
Slack Notifications / Cancelled notifications	-1s
Slack Notifications / Fixed notifications	-1s
Failed workflow tasks	0s
	28s

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