[in the wild] add ZocDoc

Author: hshoff

README.md

@@ -1444,6 +1444,7 @@
   - **Shutterfly**: [shutterfly/javascript](https://github.com/shutterfly/javascript)
   - **Userify**: [userify/javascript](https://github.com/userify/javascript)
   - **Zillow**: [zillow/javascript](https://github.com/zillow/javascript)
+  - **ZocDoc**: [ZocDoc/javascript](https://github.com/ZocDoc/javascript)
 
 ## <a name='translation'>Translation</a>