Add dani's url

Author: daiyi

_config.yml

@@ -30,7 +30,7 @@ team:
     url: http://franka.tech
   - name: Danielle
     image: dani.jpg
-    url:
+    url: https://twitter.com/dantoml
   - name: Dave
     image: dave.png
     url: http://daveliepmann.com