Update cancel task API reference (#3080)

Fixes #2818

Author: RecreationalMath

reference/api/tasks.mdx

@@ -343,7 +343,7 @@ If you try retrieving a deleted task, Meilisearch will return a [`task_not_found
 
 <RouteHighlighter method="POST" route="/tasks/cancel?{query_parameter}"/>
 
-Cancel any number of `enqueued` or `processing` tasks based on their `uid`, `status`, `type`, `indexUid`, or the date at which they were enqueued, processed, or completed.
+Cancel any number of `enqueued` or `processing` tasks based on their `uid`, `status`, `type`, `indexUid`, or the date at which they were enqueued (`enqueuedAt`) or processed (`startedAt`).
 
 Task cancellation is an atomic transaction: **either all tasks are successfully canceled or none are**.