Monitors - clarify share option

[kimsauce]

We do not have a share option for monitors. Monitors stop executing when the creator is deleted. In that case, you need to duplicate the monitor under another user.

The https://help.sumologic.com/docs/alerts/monitors/monitor-faq/#one-of-our-monitors-suddenly-stopped-sending-notifications-even-though-i-see-it-on-the-monitors-page and https://help.sumologic.com/docs/manage/users-roles/users/delete-user/#what-happens-when-you-delete-a-user page mentions this.

we should update the monitors documentation to include a heads up about this.

Slack Message

[stacykor]

@Melvin-CnC please write a note for the https://help.sumologic.com/docs/alerts/monitors/#limitations page
"Note: You cannot share monitors, you must duplicate the monitor under another user" and get @angadrandhawa1 to review.

[Melvin-CnC]

@stacykor added and later edited the note [as suggested by Megha]