Improve documentation on the Set Gateway Location

[i3mSuperMan]

Summary

The location settings you manually entered will be overwritten by the updates from the gateway status messages.

Gateways connected over the UDP are not supported to update the location from the status messages. This is supported for the gateways connecting with authentication.

Screenshots

Changes

• Added the statement This works for gateway connecting with authentication; gateways connected over UDP are not supported.

Checklist

• Scope: The referenced issue is addressed, there are no unrelated changes.
• Run Locally: Verified that the docs build using make server, posted screenshots, verified external links. Test with HUGO_PARAMS_SEARCH_ENABLED=true if style changes will affect the search bar.
• New Features Marked: Documentation for new features is marked using the new-in-version shortcode, according to the guidelines in CONTRIBUTING.
• Style Guidelines: Documentation obeys style guidelines in CONTRIBUTING.
• Commits: Commit messages follow guidelines in CONTRIBUTING, there are no fixup commits left.