Fixed issue with Tables sync sample using updateEntity instead of upsertEntity. (Azure#28454)

Author: vcolin7

sdk/tables/azure-data-tables/src/samples/java/com/azure/data/tables/TableHelloWorld.java

@@ -64,7 +64,7 @@ public static void main(String[] args) {
             .addProperty("Type", "Marker")
             .addProperty("Color", "Blue");
 
-        tableClient.updateEntity(entityForUpsert);
+        tableClient.upsertEntity(entityForUpsert);
 
         System.out.printf("Upserted entity with partition key '%s' and row key '%s'.%n", partitionKey, rowKey);