ref(stats-detectors): Update description (#57674)

Change `Exp Transaction Duration Regression` to `Transaction Duration
Regression (Experimental)` for better clarity

src/sentry/issues/grouptype.py

@@ -324,7 +324,7 @@ class PerformanceHTTPOverheadGroupType(PerformanceGroupTypeDefaults, GroupType):
 class PerformanceDurationRegressionGroupType(PerformanceGroupTypeDefaults, GroupType):
     type_id = 1017
     slug = "performance_duration_regression"
-    description = "Exp Transaction Duration Regression"
+    description = "Transaction Duration Regression (Experimental)"
     noise_config = NoiseConfig(ignore_limit=0)
     category = GroupCategory.PERFORMANCE.value
 

tests/sentry/statistical_detectors/test_issue_platform_adapter.py

@@ -36,7 +36,7 @@ def test_send_regressions_to_plaform(mock_produce_occurrence_to_kafka):
         occurrence,
         **{
             "project_id": 123,
-            "issue_title": "Exp Transaction Duration Regression",
+            "issue_title": "Transaction Duration Regression (Experimental)",
             "subtitle": "Increased from 14.0ms to 28.0ms (P95)",
             "resource_id": None,
             "evidence_data": mock_regressions[0],