Bump org.apache.kafka:kafka_2.13 in /data-prepper-plugins/kafka-plugins

Bumps org.apache.kafka:kafka_2.13 from 3.6.1 to 3.8.0.

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

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

data-prepper-plugins/kafka-plugins/build.gradle

@@ -61,8 +61,8 @@ dependencies {
     testImplementation project(':data-prepper-core')
     testImplementation project(':data-prepper-plugin-framework')
     testImplementation project(':data-prepper-pipeline-parser')
-    testImplementation 'org.apache.kafka:kafka_2.13:3.6.1'
-    testImplementation 'org.apache.kafka:kafka_2.13:3.6.1:test'
+    testImplementation 'org.apache.kafka:kafka_2.13:3.8.0'
+    testImplementation 'org.apache.kafka:kafka_2.13:3.8.0:test'
     testImplementation 'org.apache.curator:curator-test:5.5.0'
     testImplementation('com.kjetland:mbknor-jackson-jsonschema_2.13:1.0.39')
     testImplementation project(':data-prepper-plugins:otel-metrics-source')