Fix formatting and add change log

Author: aravind-segu

NEXT_CHANGELOG.md

@@ -11,5 +11,6 @@
 ### Internal Changes
 * Introduce automated tagging ([#888](https://github.com/databricks/databricks-sdk-py/pull/888))
 * Update Jobs GetJob API to support paginated responses ([#869](https://github.com/databricks/databricks-sdk-py/pull/869)).
+* Update On Behalf Of User Authentication in Multithreaded applications ([#907](https://github.com/databricks/databricks-sdk-py/pull/907))
 
 ### API Changes

tests/test_model_serving_auth.py

@@ -163,7 +163,7 @@ def authenticate():
 
     thread.start()
     thread.join()
-    assert (successful_authentication_event.is_set())
+    assert successful_authentication_event.is_set()
 
 
 # If this credential strategy is being used in a non model serving environments then use default credential strategy instead