ci: Update Feature Flags

Workflow run: https://github.com/HumanSignal/label-studio/actions/runs/12627448119

Author: robot-ci-heartex

Diff for: label_studio/feature_flags.json

@@ -1591,7 +1591,7 @@
       "trackEvents": false,
       "trackEventsFallthrough": false,
       "debugEventsUntilDate": null,
-      "version": 4,
+      "version": 3,
       "deleted": false
     },
     "fflag_feat_all_leap_1429_flexible_reject_mode_250924_short": {