Bump org.apache.kafka:kafka-clients

Bumps org.apache.kafka:kafka-clients from 2.4.1 to 2.6.3.

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

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

Author: dependabot[bot]

statefun-e2e-tests/statefun-e2e-tests-common/pom.xml

@@ -28,7 +28,7 @@ under the License.
     <artifactId>statefun-e2e-tests-common</artifactId>
 
     <properties>
-        <kafka.version>2.4.1</kafka.version>
+        <kafka.version>2.6.3</kafka.version>
     </properties>
 
     <dependencies>