Broken links in the resources file

[RCheesley]

I haven't got the time right now to fix these but here's the output of the GitHub Action checking for broken links - logging to ensure we fix/address:

Issues :-(

Links

1. [L088] 403 https://x.ai/
2. [L099] https://flat.social/ Failed to open TCP connection to flat.social:443 (connect(2) for "flat.social" port 443)

[davidgs]

I generally just remove links that are dead. I can go do that now.

[davidgs]

Addressed in issue #81