Updating Geo Documentation

What does this MR do and why?

This MR updates some outdated Geo documentation. We changed the firewall requirements so that the secondary site must have HTTP(s) ports open to the priamry site and this particular line is not correct. Slack thread here:

https://gitlab.slack.com/archives/C7U95P909/p1723060231872039

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.