[Please provide GA workflow runs (`ci-approved` label) for a PR] KAFKA-20851 spotless gradle plugin version update: 8.4.0 -->> 8.9.0

[Dejan Stojadinović]

Hello owners/maintainers/commiters,

As in subject :)

GitHub PR link:

   - https://github.com/apache/kafka/pull/22973 KAFKA-20851 spotless gradle
   plugin version update: 8.4.0 -->> 8.9.0

Regards,
Dejan
https://github.com/dejan2609