Update bridging-celo-from-holesky-to-dango-using-viem.mdx (#1438)

* Update bridging-celo-from-holesky-to-dango-using-viem.mdx

- add intro
- add an explanation for the dango.js file 
- link the Optimism SDK

* add links to the viem OP Stack

docs/cel2/bridging/bridging-celo-from-holesky-to-dango-using-viem.mdx

@@ -5,9 +5,13 @@ title: Bridging Celo from Holesky to Dango using Viem
 import Tabs from "@theme/Tabs";
 import TabItem from "@theme/TabItem";
 
-Bridging Celo from Holesky to Dango is simple, all you need to do is call `depositERC20Transaction` on `OptimismPortalProxy` on Holesky.
+In this tutorial, you will learn how to programmatically bridge CELO from Holskey to Dango using the [viem OP Stack](https://viem.sh/op-stack).  
 
-`depositERC20Transaction` pulls Celo tokens from the account which is why you need to approve `OptimismPortalProxy` to spend Celo token first.
+Bridging CELO from Holesky to Dango is simple, all you need to do is call [`depositERC20Transaction`](https://viem.sh/op-stack/actions/depositTransaction#deposittransaction) on the `OptimismPortalProxy` contract on Holesky.
+
+The `depositERC20Transaction` pulls CELO tokens from the account which is why you need to approve `OptimismPortalProxy` to spend CELO tokens first.
+
+As you can see, we’ve created a `dango.js` file that contains all the necessary data for interacting with the test network. Since Dango will be a short-lived testnet, chain data won’t be available through viem or wagmi, so this file ensures you have everything you need directly at hand.
 
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   <TabItem value="index.js" label="index.js" default>