doc: 3.6 Release note correction.

Change-Id: I772a6a67f93e76820106c63c93325621b31b8ceb
Signed-off-by: Dave McAllister < dmcallis@redhat.com >
Reviewed-on: http://review.gluster.org/9057
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Reviewed-by: Lalatendu Mohanty <lmohanty@redhat.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>