various [g] casks: add rosetta caveat

[krehel]

Important: Do not tick a checkbox if you haven’t performed its action. Honesty is indispensable for a smooth review process.

In the following questions <cask> is the token of the cask you're submitting.

After making any changes to a cask, existing or new, verify:

• The submission is for a stable version or documented exception.
• brew audit --cask --online <cask> is error-free.
• brew style --fix <cask> reports no offenses.

[krehel]

audit for gotomeeting: failed

• The homepage URL https://www.goto.com/meeting is not reachable (HTTP status code 403)

Only failure. Adding ci-skip-homepage to avoid dropping and recommitting.