Use equality in version presence assertion

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: df26610a-beb4-44ea-a04a-6aedeb316d2a

Author: andystaples

tests/durabletask/test_orchestration_executor.py

@@ -1746,7 +1746,7 @@ def orchestrator(ctx: task.OrchestrationContext, input: int):
     complete_action = get_and_validate_complete_orchestration_action_list(1, actions)
     assert complete_action.orchestrationStatus == pb.ORCHESTRATION_STATUS_CONTINUED_AS_NEW
     assert complete_action.result.value == json.dumps(2)
-    assert complete_action.HasField("newVersion") is (new_version is not None)
+    assert complete_action.HasField("newVersion") == (new_version is not None)
     if new_version is not None:
         assert complete_action.newVersion.value == new_version
     assert len(complete_action.carryoverEvents) == (3 if save_events else 0)