Add new MessageDeduplicationId behavior to docs (#809)

Author: tomazfernandes

docs/src/main/asciidoc/sqs.adoc

@@ -246,7 +246,8 @@ SendResult<String> result = template.send(to -> to.queue("myQueue")
 ```
 
 NOTE: To send messages to a Fifo queue, the options include `messageDeduplicationId` and `messageGroupId` properties.
-If either values are not provided, a random UUID is generated.
+If `messageGroupId` is not provided, a random UUID is generated by the framework.
+If `messageDeduplicationId` is not provided and content deduplication is disabled on AWS, a random UUID is generated.
 The generated values can be retrieved in the headers of the `Message` contained in the `SendResult` object.