Docs: Feedback for SQL

Hi, I have some feedback about [this page](https://github.com/hazelcast/imdg-docs/edit/v/4.2/docs/modules/sql/pages/distributed-sql.adoc)

> If you’re using the hazelcast-all or hazelcast-enterprise-all packages, the hazelcast-sql module is included in them by default. If not, i.e., you are using hazelcast or hazelcast-enterprise, then you need to have hazelcast-sql in the classpath.

We should provide a link to download `hazelcast-sql` with the relevant version