Couldn't find a script that did this. We don't use this a lot but I was asked to patch Cisco Webex to ensure that the users that do have it were on the latest version.
This is based on a script we've been using that does the same thing for chrome.
https://github.com/theadamcraig/jamf-scripts/blob/master/Cisco%20Webex%20-%20install%20latest%20version.sh