Add Gem Wallet to Wallets

[wrexgem]

Description

New PR to get Gem Wallet added to the Catalogue of Wallets on ethereum.org. See approved issue below. Thank you!

Related Issue

• Fixes #13206

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[wrexgem]

Thank you @wackerow - Added NFT tag and removed new to crypto tag. Should be good now!

[wackerow]

@all-contributors please add @wrexgem for tool

[allcontributors[bot]]

@wackerow

I've put up a pull request to add @wrexgem! :tada: