Update 2.14.17 release notes

Change-Id: Id8d0f348340f07a1ee84f640dd87a8a440b3b40e
diff --git a/pages/site/releases/2.14.md b/pages/site/releases/2.14.md
index 6fed3ef..981060b 100644
--- a/pages/site/releases/2.14.md
+++ b/pages/site/releases/2.14.md
@@ -381,6 +381,8 @@
   See the [mailing list discussion](https://groups.google.com/d/msg/repo-discuss/2JgaofWQYpY/wdLY5tiWAgAJ)
   for more information.
 
+* Upgrade Elasticsearch REST client to 6.4.3.
+
 ### 2.14.16
 
 * [Issue 9836](https://bugs.chromium.org/p/gerrit/issues/detail?id=9836):