Specify send method more precisely in changelog

sdk/servicebus/azure-servicebus/CHANGELOG.md

@@ -14,7 +14,7 @@
 **Breaking Changes**
 
 * Session receivers are now created via their own top level functions, e.g. `get_queue_sesison_receiver` and `get_subscription_session_receiver`.  Non session receivers no longer take session_id as a paramter.
-* `Send()` no longer takes a timeout parameter, as it should be redundant with retry options provided when creating the client.
+* `ServiceBusSender.Send()` no longer takes a timeout parameter, as it should be redundant with retry options provided when creating the client.
 
 ## 7.0.0b1 (2020-04-06)