fix example

Author: nick-zh

Diff for: src/ext-php-simple-kafka-client/docker-compose.yml

@@ -15,13 +15,13 @@ services:
       - ./:/app
 
   zookeeper:
-    image: confluentinc/cp-zookeeper:7.0.0
+    image: confluentinc/cp-zookeeper:7.3.2
     environment:
       ZOOKEEPER_CLIENT_PORT: 2182
       ZOOKEEPER_TICK_TIME: 2000
 
   kafka:
-    image: confluentinc/cp-kafka:7.0.0
+    image: confluentinc/cp-kafka:7.3.2
     depends_on:
       - zookeeper
     ports:
@@ -37,7 +37,7 @@ services:
       KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
 
   kafka-schema-registry:
-    image: confluentinc/cp-schema-registry:7.0.0
+    image: confluentinc/cp-schema-registry:7.3.2
     depends_on:
       - zookeeper
       - kafka
@@ -46,5 +46,6 @@ services:
     environment:
       SCHEMA_REGISTRY_HOST_NAME: kafka-schema-registry
       SCHEMA_REGISTRY_LISTENERS: "http://0.0.0.0:9083"
+      SCHEMA_REGISTRY_KAFKASTORE_BOOTSTRAP_SERVERS: 'kafka:9096'
       SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: 'zookeeper:2182'
       SCHEMA_REGISTRY_AVRO_COMPATIBILITY_LEVEL: 'full_transitive'