[178390751]: fix docstring for total share of sum

Author: ernestoarbitrio

src/cr/cube/matrix/measure.py

@@ -2306,7 +2306,7 @@ def _subtotal_rows(self):
 class _TotalShareSum(_BaseSecondOrderMeasure):
     """Provides the row share of sum measure for a matrix.
 
-    Row share sum is the sum of each subvar divided by the TOTAL number of row items.
+    Total share sum is the sum of each subvar divided by the TOTAL number of items.
     """
 
     @lazyproperty