Fix expected df in TestMetricSummary's test_compute (facebook#3381)

Summary:
Pull Request resolved: facebook#3381

Our nightly cron GHA has recently started failing due to a unit test (https://github.com/facebook/Ax/actions/workflows/cron.yml)

WIth the changes introduced in D69611291, we now set `lower_is_better` on objective metrics in configure_optimization() - this change is to update the `test_compute` unit test to reflect this

Reviewed By: mpolson64

Differential Revision: D69786858

fbshipit-source-id: ec57df85a0171ddf121d095910bd7bffb1c902c9

ax/analysis/tests/test_metric_summary.py

@@ -80,7 +80,7 @@ def test_compute(self) -> None:
                     ),
                 ),
                 "Bound": ["None", ">= 1.0", "<= 0.0", "None"],
-                "Lower is Better": ["None", "None", "None", "None"],
+                "Lower is Better": [False, False, "None", "None"],
             }
         )
         pd.testing.assert_frame_equal(card.df, expected)