Reject low-confidence targets in 2022 localizer

Change-Id: Iab8de619386d57a64c3a398333494a90069537df
Signed-off-by: James Kuszmaul <jabukuszmaul+collab@gmail.com>
diff --git a/y2022/localizer/localizer_status.fbs b/y2022/localizer/localizer_status.fbs
index 8be770e..ae96b63 100644
--- a/y2022/localizer/localizer_status.fbs
+++ b/y2022/localizer/localizer_status.fbs
@@ -7,6 +7,7 @@
   NO_CALIBRATION = 1,
   TURRET_TOO_FAST = 2,
   MESSAGE_BRIDGE_DISCONNECTED = 3,
+  LOW_CONFIDENCE = 4,
 }
 
 table CumulativeStatistics {