fix(deps): update kafka.version to v4 (#662)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

kafka-sample/java/pom.xml

@@ -14,7 +14,7 @@
         <java.version>17</java.version>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <kafka.version>3.9.0</kafka.version>
+        <kafka.version>4.0.0</kafka.version>
     </properties>
 
     <dependencies>