Link EVM Testnet quick start guide to deploy a smart contract guide

[Ginowine]

Description of change

Added a link from EVM Testnet quick start guide to deploy a smart contract guide

Links to any relevant issues

fixes #1573

Type of change

• Documentation Enhancement

Change checklist

• [x] I have followed the contribution guidelines for this project
• [x] I have performed a self-review of my own changes
• [x] I have made sure that added/changed links still work

[github-actions[bot]]

This pull request has been deployed to Vercel.

Latest commit: f0992b78998d1ac33eca654421c617247f174f4e

:white_check_mark: Preview: https://iota-wiki-rdkye6uak-iota1.vercel.app