Update README.md

Author: gkorland

README.md

@@ -11,7 +11,7 @@ Installation is done using the
 [`npm install` command](https://docs.npmjs.com/getting-started/installing-npm-packages-locally):
 
 ```bash
-$ npm install redisgraph.js
+npm install redisgraph.js
 ```
 
 ## Overview