Update DEMO.md

DEMO.md

 Create your Spring Boot API project using [start.spring.io](https://start.spring.io).
 
 ```
-http https://start.spring.io/starter.zip \/
+http https://start.spring.io/starter.zip \
 dependencies==data-jpa,data-rest,h2,web,devtools,security,stormpath -d
 ```
 
 Skin: Skin with dynamic hardware controls
 ```
 
-After performing these steps, I was able to run `ionic emulate android` and see my app running in the AVD.
+After performing these steps, I was able to run `ionic emulate android` and see my app running in the AVD.