[S2GRAPH-232] Elimination of inefficiency due to duplication in GraphQL schema generation.

JIRA:
  [S2GRAPH-232] https://issues.apache.org/jira/browse/S2GRAPH-232

Pull Request:
  Closes #181

Author
  daewon <daewon@apache.org>
diff --git a/CHANGES b/CHANGES
index 734f498..018deb4 100644
--- a/CHANGES
+++ b/CHANGES
@@ -85,6 +85,7 @@
     * [S2GRAPH-221] - Unify configurations for bulk and mutate in S2GraphSink.
     * [S2GRAPH-230] - ResourceManager onEvict cause segmentation fault with AnnoyModelFetcher 
     * [S2GRAPH-231] - Change the GraphQL type name to a valid string.
+    * [S2GRAPH-232] - Elimination of inefficiency due to duplication in GraphQL schema generation.
 
 ** New Feature
     * [S2GRAPH-123] - Support different index on out/in direction.