improve phrasing

The previous sentence could be interpreted as "For some reason, …, you can modify this value.", which is not what is meant here.

Author: greg0ire

reference/forms/types/money.rst

@@ -85,7 +85,7 @@ scale
 
 **type**: ``integer`` **default**: ``2``
 
-For some reason, if you need some scale other than 2 decimal places,
+If, for some reason, you need some scale other than 2 decimal places,
 you can modify this value. You probably won't need to do this unless,
 for example, you want to round to the nearest dollar (set the scale
 to ``0``).