[Docs] Fix misplaced setting in compose files (#2886)

(cherry picked from commit de5b34a5c1c7ce6c727d980f7dba950ddbd528b4)

documentation/compose/kafka-ui.yaml

@@ -22,7 +22,7 @@ services:
       KAFKA_CLUSTERS_0_KAFKACONNECT_0_ADDRESS: http://kafka-connect0:8083
       KAFKA_CLUSTERS_1_NAME: secondLocal
       KAFKA_CLUSTERS_1_BOOTSTRAPSERVERS: kafka1:29092
-      KAFKA_CLUSTERS_0_METRICS_PORT: 9998
+      KAFKA_CLUSTERS_1_METRICS_PORT: 9998
       KAFKA_CLUSTERS_1_SCHEMAREGISTRY: http://schemaregistry1:8085
 
   kafka0: