Unable to disable Update Checker (RC 3.18.5)

Description:

In Administration settings -> General , we can't disable the Update Checker , despite having appropriate permissions to do so :

We want to disable this as we do update our instance (Sticking with LTS) , but admins get annoyed with regular update notifications.

(For users in the Admin Role set via Permissions then went to settings)

Steps to reproduce:

1. Go to "Administration" - > Permissions -> Settings, Enable the two settings (as above)
2. Go to "Administration" - > General , scroll down to Update , expand the section
3. Unable to turn off the update checker

Expected behavior:

Be able to disable the update checker

Actual behavior:

When hovering over the switch with the mouse we get the "no entry sign"

Server Setup Information:

• Version of Rocket.Chat Server: . 3.18.5
• Operating System: Ubuntu 20.04.3
• Deployment Method: Docker-Compose
• Number of Running Instances: 1
• DB Replicaset Oplog: rs0
• NodeJS Version: Not sure
• MongoDB Version: 4.2 (Using wiredTiger)

Client Setup Information

• Desktop App or Browser Version: Firefox 95 , alos tested in Chrome 97
• Operating System: Ubuntu 20.04.3

Start by reproducing the issue through Administration → Permissions → Settings and Administration → General → Update using an Admin role, on the reported settings flow. Trace the permission and update-checker handling in the TypeScript code. Done means an authorized administrator can disable the update checker and no longer receives its notifications.