chore(deps): bump org.apache.kafka:kafka-clients

Bumps org.apache.kafka:kafka-clients from 3.9.1 to 3.9.2.

---
updated-dependencies:
- dependency-name: org.apache.kafka:kafka-clients
  dependency-version: 3.9.2
  dependency-type: direct:production
...

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Author: dependabot[bot]

examples/E30_flink-kafscale-demo/pom.xml

@@ -12,7 +12,7 @@
     <maven.compiler.release>11</maven.compiler.release>
     <flink.version>1.18.1</flink.version>
     <flink.kafka.connector.version>3.1.0-1.18</flink.kafka.connector.version>
-    <kafka.clients.version>3.9.1</kafka.clients.version>
+    <kafka.clients.version>3.9.2</kafka.clients.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <main.class>com.example.kafscale.flink.WordCountJob</main.class>
   </properties>