Merge from upstream of this branch.

Author: KieranBrantnerMagee

sdk/servicebus/azure-servicebus/CHANGELOG.md

@@ -16,7 +16,7 @@
 * Remove `is_anonymous_accessible` from management entities.
 * Remove `support_ordering` from `create_queue` and `QueueProperties`
 * Remove `enable_subscription_partitioning` from `create_topic` and `TopicProperties`
-* `get_dead_letter_[queue,subscription]_receiver()` has been removed.  To connect to a dead letter queue, utilize the `SubQueue` parameter of `get_[queue,subscription]_receiver()` provided with a value from the `SubQueue` enum
+* `get_dead_letter_[queue,subscription]_receiver()` has been removed.  To connect to a dead letter queue, utilize the `sub_queue` parameter of `get_[queue,subscription]_receiver()` provided with a value from the `SubQueue` enum
 
 ## 7.0.0b5 (2020-08-10)