Update Gem Wallet link

[l0vvkey]

Summary

• Update the Gem Wallet entry to link to https://gemwallet.com/ instead of the Celo-specific landing page

Testing

• git diff --check

[l0vvkey]

Thanks for reviewing this follow-up. Also, I wanted to ask: how could Gem Wallet get added to the Celo ecosystem page here? https://celo.org/ecosystem

[l0vvkey]

cc @GigaHierz, since you reviewed/merged the previous Gem Wallet PR. Could you also advise on the ecosystem listing question above when you have a chance?

[l0vvkey]

Hi @karlb and @seolaoh, gentle follow-up on this small link-fix PR when you have a chance. Checks are passing, there are no conflicts, and the change only updates the Gem Wallet listing URL from the Celo-specific landing page to https://gemwallet.com/.

Also still curious about the ecosystem listing question above: what is the best path for Gem Wallet to be added to https://celo.org/ecosystem? Thanks!