docs: update link in zora-docs/docs/guides /connect-wallet-react.mdx

zora-docs/docs/guides/connect-wallet-react.mdx

Line 19 in cd7b5e6

    
           In order to submit a transaction, you must provide an [ethers signer](https://docs.ethers.io/v5/api/signer/).

Line 19, the data is outdated. A big update has been released. Here is a new link:
https://docs.ethers.org/v6/api/providers/#Signer
In the new version, the information is more complete and clear

For some reason I can't create a Pull Request and because of this I have to create Issue

Hello! We've deprecated these docs and replaced them with https://github.com/ourzora/zora-protocol/tree/main/docs