Update README.md

README.md

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-# Getting Started
+## Getting Started
 [![Open Source Love svg1](https://badges.frapsoft.com/os/v1/open-source.svg?v=103)](https://github.com/ellerbrock/open-source-badges/)
 
 Getting Started is a tool that hopes to provide a short introduction to the PDE for new/beginner users. Much of the information is derived from the [**Getting Started Tutorial**](https://processing.org/tutorials/gettingstarted/) from the Processing website.
 
 Users can flip through the frames using the **Previous** and **Next** buttons and can try examples in their own editors by using the **"Try It!"** button.
 
-# Installation
+### Installation
 You can install the Getting Started tool via the Contribution Manager in the PDE.
 1. Tools > Add Tool...
 2. Select "Getting Started" and press "Install"