Update README.md

Author: matiii

README.md

@@ -22,7 +22,7 @@ graph.AddNode(2);
 
 graph.Connect(1, 2, 5, "some custom information in edge"); //First node has key equal 1
 
-ShortestPathResult result = graph.Dijkstra(0, 1); //result contains the shortest path
+ShortestPathResult result = graph.Dijkstra(1, 2); //result contains the shortest path
 
 var path = result.GetPath();
 ```