docs: update delegating.mdx (#790)

Link to a Ethereum resource regarding wallets.

website/pages/en/network/delegating.mdx

@@ -18,7 +18,7 @@ Learn how to be an effective Delegator in The Graph Network.
 
 Delegators share the earnings of the protocol alongside all Indexers based on their delegated stake. Therefore, they must use their best judgment to choose Indexers based on multiple factors.
 
-> Please note this guide does not cover steps such as setting up MetaMask properly, as that information is widely available online.
+> Please note this guide does not cover steps such as setting up MetaMask properly. The Ethereum community provides a comprehensive resource regarding wallets through the following link ([source](https://ethereum.org/en/wallets/)).
 
 There are three sections in this guide: