[NO ISSUE] Add missing documentation link for 0.9.2

Change-Id: Id5c70f6ae69bc45e329cb17d70e616aedf500582
Reviewed-on: https://asterix-gerrit.ics.uci.edu/2298
Reviewed-by: Till Westmann <tillw@apache.org>
Tested-by: Michael Blow <mblow@apache.org>
diff --git a/README.md b/README.md
index 4a737cc..bf05c6e 100644
--- a/README.md
+++ b/README.md
@@ -90,6 +90,7 @@
 ## Documentation
 
 * [master](https://ci.apache.org/projects/asterixdb/index.html) |
+  [0.9.2](http://asterixdb.apache.org/docs/0.9.2/index.html) |
   [0.9.1](http://asterixdb.apache.org/docs/0.9.1/index.html) |
   [0.9.0](http://asterixdb.apache.org/docs/0.9.0/index.html)