test: preserve Windows dual-budget coverage (PR #514)

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

Author: karthiknadig

scripts/tests/test_quality_snapshot.py

@@ -251,7 +251,7 @@ def test_noise_inside_absolute_budget_passes(self):
 
 
     def test_relative_budget_must_also_be_exceeded(self):
-        current = performance_snapshot(refresh_p50=1_060)
+        current = performance_snapshot(refresh_p50=1_160)
         _, failures = compare_performance(current, performance_snapshot(refresh_p50=1_000), 'Windows')
         self.assertEqual(failures, [])