Update backend deployed url

README.md

@@ -2,7 +2,7 @@
 
 Dijkstra is an app thas uses Dijkstra algorithm to display the shortest path between different cities in Belgium.
 
-Deployed backend: https://dijkstra-rui.herokuapp.com/
+Deployed backend: https://dijkstra-backend.herokuapp.com/
 
 ## API Documentation
 ___
@@ -132,4 +132,4 @@ A json object composed of the `path` (in the correct order) and the total `dista
   ],
   "distance": 337
 }
-```
+```