docs: intro.md

Author: Ratan Kaliani

book/introduction.md

@@ -4,7 +4,7 @@
    <a href="https://github.com/succinctlabs/op-succinct/blob/main/LICENSE-MIT"><img src="https://img.shields.io/badge/License-MIT-d1d1f6.svg?style=flat&labelColor=1C2C2E&color=BEC5C9&logo=googledocs&label=license&logoColor=BEC5C9" alt="License"></a>
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-# Overview
+## Overview
 
 OP Succinct is the production-grade proving engine for the OP Stack, powered by [SP1](https://docs.succinct.xyz/docs/sp1/introduction) and the [Succinct Prover Network](https://docs.succinct.xyz/docs/network/introduction).