Karapace upgraded to version 6.2.1

Karapace 6.2.1 improves performance, security, and reliability for your clusters.

If you use Protobuf schemas with map<K,V> fields in Schema Registry, this release fixes an issue where binary serialization and deserialization didn't preserve the underlying map_entry representation.

This release also updates the protobuf and confluent-kafka-py dependencies for Schema Registry and Kafka REST proxy.

For details, see the Karapace 6.2.1 release notes.