📝 add note about edge priority

README.md

@@ -31,6 +31,7 @@ graph.add_node(Node("node_a", value="hihi"))
 
 - `outline` options on methods don't exist any more. Text no longer has any outlines.
 - You can no longer compare nodes with other nodes like `NodeA > NodeB`. To do this now, you need to specify the priority: `NodeA.priority() > NodeB.priority()`
+- The above also applies to edges.
 
 
 #### Todo