Update the 1.18.1 release blog

Change-Id: Id57f855c824a9dc281db78e0cbb74ee76e3053df
Reviewed-on: http://gerrit.cloudera.org:8080/23847
Reviewed-by: Alexey Serbin <alexey@apache.org>
Tested-by: Abhishek Chennaka <achennaka@cloudera.com>
1 file changed