[data-plane]: Bump assertj-core from 3.18.0 to 3.18.1 in /data-plane (#396)
[data-plane]: Bump assertj-core from 3.18.0 to 3.18.1 in /data-plane (#396)

Bumps [assertj-core](https://github.com/assertj/assertj-core) from 3.18.0 to 3.18.1.
- [Release notes](https://github.com/assertj/assertj-core/releases)
- [Commits](https://github.com/assertj/assertj-core/compare/assertj-core-3.18.0...assertj-core-3.18.1)

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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