add: connectkit to list of supported third-party libraries

[lochie]

Description

Adds Family's ConnectKit to list of third-party libraries that support MetaMask/EIP-6963.

Issue(s) fixed

N/A

Preview

https://docs.metamask.io/wallet/how-to/connect/#connect-to-metamask-using-third-party-libraries

Checklist

Complete this checklist before merging your PR:

• [ ] If this PR contains a major change to the documentation content, I have added an entry to the top of the "What's new?" page.
• [ ] The proposed changes have been reviewed and approved by a member of the documentation team.

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Name	Status	Preview	Comments	Updated (UTC)
metamask-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Aug 1, 2024 8:59pm