Apache Kafka 4.1 set as default version

Aiven for Apache Kafka® now uses version 4.1 as the default for new services, replacing version 3.9. This change ensures that new deployments use the latest improvements in performance, security, and reliability. Existing services are not affected.

For details, see:

• Apache Kafka® 4.1.0 release notes
• Apache Kafka® 4.1.1 release notes