MB-11691: correct support link for Enterprise Edition

Change-Id: I1546ed8391866ff4fffd48c2ebca1c48b9e70282
Reviewed-on: http://review.couchbase.org/39491
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>
Tested-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>