Fix test to be robust against fp numerics

Summary:

https://github.com/pytorch/pytorch/actions/runs/12890471648/job/35941113858

Author: mergennachin

devtools/inspector/tests/inspector_test.py

@@ -55,7 +55,7 @@ def test_perf_data(self) -> None:
         perfData = PerfData(random_floats)
 
         # Intentionally use a different way to calculate p50 from the implementation
-        self.assertEqual(perfData.p50, statistics.median(random_floats))
+        self.assertAlmostEqual(perfData.p50, statistics.median(random_floats))
 
     def test_event_block_to_dataframe(self) -> None:
         eventBlock = EventBlock(name=EVENT_BLOCK_NAME, events=self._gen_random_events())