Upgrade kafka-avro-serializer to 7.9.0

Author: rymarm

contrib/storage-kafka/pom.xml

@@ -97,7 +97,7 @@
     <dependency>
       <groupId>io.confluent</groupId>
       <artifactId>kafka-avro-serializer</artifactId>
-      <version>6.1.1</version>
+      <version>7.9.0</version>
     </dependency>
 
     <!-- Test dependencies -->