added a comment

Achim Brandt · Achim Brandt · commit 204d58f6958c · 2015-09-25T22:17:10.000+02:00
diff --git a/README.md b/README.md
@@ -430,4 +430,6 @@ see 2.4.4
 	* createEdge takes graphName but needs database name
 * ArangoDB 2.6 support
 
+## since 2.6.8
+* fixed GRAPH_EDGES() 2.6-incompatibility
  
