Update visualization.md

adjusted to have  next to qudt:unit  als qudt:hasUnit mentioned since we will migrate to that. After migration I will adjust it to only having qudt:hasUnit mentioned and remove qudt:unit mention

documentation/visualization.md

@@ -61,8 +61,8 @@ A descriptive name of the Dimension, this description can be multilingual.
 #### schema:description
 A description of the Dimension, this description can be multilingual.
 
-#### qudt:unit
-To describe the unit of the values in a dimension the respective `qudt:Unit` instance can be attached to a [Dimension Constraint](#dimensionconstraints) with the `qudt:unit` property.
+#### qudt:unit / qudt:hasUnit
+To describe the unit of the values in a dimension the respective `qudt:Unit`/ `qudt:hasUnit` instance can be attached to a [Dimension Constraint](#dimensionconstraints) with the `qudt:unit` / `qudt:hasUnit` property.
 
 #### qudt:scaleType