docs: Issue on page Batch statements

[ZuzaOsa]

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

Problem

A link to DataStax documentation on how to use batching effectively is outdated and throws Page Not Found.

Suggested fix

I think the correct link should be https://docs.datastax.com/en/cql-oss/3.3/cql/cql_using/useBatch.html