[ISSUE #436]Upgrade RocketMQ version to 4.9.3 (#437)

Co-authored-by: zhangjidi2016 <zhangjidi@cmss.chinamobile.com>
diff --git a/rocketmq-spring-boot-parent/pom.xml b/rocketmq-spring-boot-parent/pom.xml
index 8d60797..21af4d6 100644
--- a/rocketmq-spring-boot-parent/pom.xml
+++ b/rocketmq-spring-boot-parent/pom.xml
@@ -40,7 +40,7 @@
 
         <rocketmq.spring.boot.version>2.2.2-SNAPSHOT</rocketmq.spring.boot.version>
 
-        <rocketmq.version>4.9.2</rocketmq.version>
+        <rocketmq.version>4.9.3</rocketmq.version>
         <slf4j.version>1.7.25</slf4j.version>
         <jackson.version>2.11.1</jackson.version>
         <fastjson.version>1.2.72</fastjson.version>