build(deps): bump org.apache.kafka:kafka-clients in /plugins/kafka

Bumps org.apache.kafka:kafka-clients from 2.1.1 to 2.6.3.

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

Signed-off-by: dependabot[bot] <support@github.com>

plugins/kafka/pom.xml

@@ -41,7 +41,7 @@
         <dependency>
             <groupId>org.apache.kafka</groupId>
             <artifactId>kafka-clients</artifactId>
-            <version>2.1.1</version>
+            <version>2.6.3</version>
             <scope>provided</scope>
         </dependency>
 

pom.xml

@@ -76,7 +76,7 @@
         <!--        <version.spring-cloud-starter-gateway>2.2.8.RELEASE</version.spring-cloud-starter-gateway>-->
         <version.maven-shade-plugin>3.2.4</version.maven-shade-plugin>
         <version.log4j>2.17.1</version.log4j>
-        <version.kafka>2.8.2</version.kafka>
+        <version.kafka>2.6.3</version.kafka>
         <version.lettuce>5.3.6.RELEASE</version.lettuce>
         <version.metrics>4.2.23</version.metrics>
         <version.jedis>3.5.2</version.jedis>