Update README.md

Author: gkorland

README.md

@@ -13,7 +13,7 @@
 [RedisGraph](https://github.com/RedisLabsModules/redis-graph/) JavaScript Client - [API Docs](https://redisgraph.github.io/redisgraph.js/)
 
 
-# Installation
+## Installation
 
 Installation is done using the
 [`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):