added histogram description

src/modules/AnalysisDUT/README.md

@@ -17,6 +17,7 @@ Analysis module for CLICpix2 prototypes. This module is still work in progress,
 * 2D Map of cluster sizes for associated clusters
 * 2D Map of cluster ToT values from associated clusters
 * 2D Map of associated hits
+* 2D Map of tracks not associated to a cluster
 * 2D Map of associated hits within the defined region-of-interest
 * Distribution of pixel ToT values from associated clusters
 * 2D Map of pixel ToT values from associated clusters