docs: Issue on page Java Driver for Scylla and Apache Cassandra®

[pogzie]

I would like to report an issue on page https://java-driver.docs.scylladb.com/scylla-4.15.0.x/index

Problem

Docs looks to be outdated.

Suggest a fix

Listing the version tags in https://github.com/scylladb/java-driver it looks to be 4.18 is the latest. This section needs to be updated accordingly as this is also something a lot of customer are asking: driver compatibility during upgrades.

[Bouncheck]

This is a valid concern, but closing as duplicate of #302