Update README.md

Author: jeffreylanters

README.md

@@ -34,15 +34,15 @@ Hi! My name is Jeffrey Lanters, thanks for checking out my modules! I've been a
 
 # Installation
 
-## Using the Unity Package Manager
+### Using the Unity Package Manager
 
 Install the latest stable release using the Unity Package Manager by adding the following line to your `manifest.json` file located within your project's Packages directory, or by adding the Git URL to the Package Manager Window inside of Unity.
 
 ```json
 "nl.elraccoone.entity-component-system": "git+https://github.com/elraccoone/unity-entity-component-system"
 ```
 
-## Using OpenUPM
+### Using OpenUPM
 
 The module is availble on the OpenUPM package registry, you can install the latest stable release using the OpenUPM Package manager's Command Line Tool using the following command.