Bump org.apache.kafka:connect-json

Bumps org.apache.kafka:connect-json from 3.6.1 to 3.8.1.

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

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

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

@@ -32,7 +32,7 @@ dependencies {
     // bump io.confluent:* dependencies correspondingly when bumping org.apache.kafka.*
     // https://docs.confluent.io/platform/current/release-notes/index.html
     implementation 'org.apache.kafka:kafka-clients:3.6.1'
-    implementation 'org.apache.kafka:connect-json:3.6.1'
+    implementation 'org.apache.kafka:connect-json:3.8.1'
     implementation project(':data-prepper-plugins:http-common')
     implementation libs.avro.core
     implementation 'com.fasterxml.jackson.core:jackson-databind'