Document input_required status in data types

Author: LucaButBoring

docs/specification/draft/basic/utilities/tasks.mdx

@@ -607,6 +607,7 @@ Tasks can be in one of the following states:
 
 - `submitted`: The request has been received and queued for execution
 - `working`: The request is currently being processed
+- `input_required`: The task lifecycle itself encountered an error, unrelated to the associated request logic
 - `completed`: The request completed successfully and results are available
 - `failed`: The task lifecycle itself encountered an error
 - `cancelled`: The request was cancelled before completion