Add emoji

Author: jason-fox

README.md

@@ -2,7 +2,7 @@
     <img src="https://fiware.github.io/tutorials.Step-by-Step/img/fiware-farm.png" />
     <img src="https://img.shields.io/badge/NGSI-LD-d6604d.svg" width="90"/>
     <br/>
-    👨‍🌾 👩‍🌾 🐄 🐐 🐑 🐖 🐔 🌻 🥕 🌽
+    👨‍🌾 👩‍🌾 🐄 🐐 🐑 🐖 🐓 🌻 🥕 🌽
 </h1>
 
 ## Concise NGSI-LD