Update ClamAV engine version together with GitLab

[theathorn]

• [x] Add operator manual item to update ClamAV if and when we update GitLab @achave11
• [x] Modify wording of Slack reminder @melainalegaspi

[hannes-ucsc]

For demo, show updated operator manual and Slack notification text.

[hannes-ucsc]

We need to decide what to do with this since assignee has left the team.

[melainalegaspi]

Created notification via Task Reminder. View list of all created tasks by entering @Task Reminder tasks in #team-boardwalk

[theathorn]

@theathorn to review current setup and request changes if needed.

[theathorn]

The reminder text is "This is a reminder for this week's operator to check for GitLab and ClamAV updates." Last message was sent on Nov. 10th at 3:00pm and marked as "Done" by @achave11.

[theathorn]

Slack workflow configuration:

[theathorn]

Change to monthly reminder.

[theathorn]

Changed schedule to "Starts January 3rd at 8:00am and repeats monthly on the first Tuesday".