chore(deps): Bump org.apache.kafka:kafka_2.13 in /examples/kafka

Bumps org.apache.kafka:kafka_2.13 from 2.8.2 to 3.9.1.

---
updated-dependencies:
- dependency-name: org.apache.kafka:kafka_2.13
  dependency-version: 3.9.1
  dependency-type: direct:production
...

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

Author: dependabot[bot]

examples/kafka/pom.xml

@@ -42,7 +42,7 @@
         <dependency>
             <groupId>org.apache.kafka</groupId>
             <artifactId>kafka_2.13</artifactId>
-            <version>2.8.2</version>
+            <version>3.9.1</version>
         </dependency>
     </dependencies>
     <build>