ScyllaDB Release 2.1.3

ScyllaDB 2.1.3 has been released as a bugfix update to the 2.1 stable branch, ensuring backward compatibility and support for rolling upgrades, as with all 2.x.y releases. The release addresses specific bugs, including an error encountered when dropping a keyspace with a User Defined Type (UDT) and a lack of support for UDT in the SSTable upload tool, scylla-tools-java. Users are encouraged to report any issues they encounter, and resources are available for obtaining ScyllaDB 2.1.3 via Docker, binary packages, and EC2 AMI, as well as guidance for upgrading from earlier 2.1.x versions.