fix: black

Author: k11kirky

posthog/test/ai/langchain/test_callbacks.py

@@ -1028,4 +1028,4 @@ async def sleep(x):  # -> Any:
     assert third_call[1]["properties"]["$ai_trace_name"] == "sleep"
     assert (
         min(approximate_latency - 1, 0) <= math.floor(third_call[1]["properties"]["$ai_latency"]) <= approximate_latency
-    )
+    )