[data-plane]: Bump logstash-logback-encoder in /data-plane (#441)
[data-plane]: Bump logstash-logback-encoder in /data-plane (#441)

Bumps [logstash-logback-encoder](https://github.com/logstash/logstash-logback-encoder) from 6.4 to 6.5.
- [Release notes](https://github.com/logstash/logstash-logback-encoder/releases)
- [Commits](https://github.com/logstash/logstash-logback-encoder/compare/logstash-logback-encoder-6.4...logstash-logback-encoder-6.5)

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Co-authored-by: dependabot[bot] <1c358da00a777d4e9898c1280ab801e2df165188@users.noreply.github.com>
knative-sandbox/eventing-kafka-broker,knative-sandbox/eventing-kafka-broker,knative-sandbox/eventing-kafka-broker