Update CreateTopicDemo.java

Signed-off-by: SimiHunjan <simi.hunjan.k@gmail.com>

Author: SimiHunjan

.github/examples/java/CreateTopicDemo.java

@@ -51,7 +51,7 @@ public static void main(String[] args ) throws Exception {
 
         // wait for Mirror Node to populate data
         System.out.println("\nWaiting for Mirror Node to update...");
-        Thread.sleep(6000);
+        Thread.sleep(10000);
 
         // query messages using Mirror Node
         String mirrorNodeUrl = mirrorNode + topicId + "/messages";