Squash spotbugs warning

Author: acogoluegnes

src/main/java/com/rabbitmq/stream/impl/Client.java

@@ -2263,6 +2263,7 @@ public Broker getLeader() {
       return leader;
     }
 
+    @SuppressFBWarnings("EI_EXPOSE_REP2")
     public List<Broker> getReplicas() {
       return replicas;
     }