Fix demo link in README.md (#27)

Author: anjackson

README.md

@@ -6,7 +6,7 @@
 pip install pathschema
 ```
 
-[Check out the online demo!](https://apollo-roboto.github.io/python-pathschema/)
+[Check out the online demo!](https://apolloroboto.github.io/python-pathschema/)
 
 # How to use