build(deps): bump io.projectreactor.kafka:reactor-kafka

Bumps [io.projectreactor.kafka:reactor-kafka](https://github.com/reactor/reactor-kafka) from 1.3.20 to 1.3.21.
- [Release notes](https://github.com/reactor/reactor-kafka/releases)
- [Commits](reactor/reactor-kafka@v1.3.20...v1.3.21)

---
updated-dependencies:
- dependency-name: io.projectreactor.kafka:reactor-kafka
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -21,7 +21,7 @@
         <springmockk.version>4.0.2</springmockk.version>
         <kotest-assertions.version>5.5.5</kotest-assertions.version>
         <maven-surefire-plugin.version>3.0.0-M7</maven-surefire-plugin.version>
-        <reactor-kafka.version>1.3.20</reactor-kafka.version>
+        <reactor-kafka.version>1.3.21</reactor-kafka.version>
         <kafka-avro-serializer.version>7.2.2</kafka-avro-serializer.version>
         <hazelcast.version>5.1.6</hazelcast.version>
         <avro.version>1.11.1</avro.version>