Update README

Author: michaeldzjap

README.md

@@ -88,7 +88,7 @@ This will save the current canvas content to a base64 data string before perform
 
 ## Example
 This project includes a simple example that demonstrates a responsive sketch pad. To build the example:
-```
-npm run build:example
+```shell
+cd example && npm run build
 ```
 Then open `example/index.html` in a browser of your choice.