Initial release notes for Gerrit 2.10

Change-Id: Iccaf7d4ea66eff290967c41ee70348a4dfc4511b

ReleaseNotes/index.txt

diff --git a/ReleaseNotes/index.txt b/ReleaseNotes/index.txt
index 8e7cac6..47f453b 100644
--- a/ReleaseNotes/index.txt
+++ b/ReleaseNotes/index.txt
@@ -1,6 +1,11 @@
 Gerrit Code Review - Release Notes
 ==================================
 
+[[2_10]]
+Version 2.10.x
+--------------
+* link:ReleaseNotes-2.10.html[2.10]
+
 [[2_9]]
 Version 2.9.x
 -------------