Update footer links to point to scaffold-eth-monad repo

[Zentex1337]

Summary

• Updated "Fork me" link to point to the scaffold-eth-monad repo instead of the original scaffold-eth-2 repo
• Updated "Support" link to point to the scaffold-eth-monad issues page instead of the scaffold-eth Telegram
• Removed TODO comments that were marking these as needing updates

Test plan

• Click the "Fork me" link in the footer and verify it goes to https://github.com/monad-developers/scaffold-eth-monad
• Click the "Support" link in the footer and verify it goes to https://github.com/monad-developers/scaffold-eth-monad/issues