ISSUE-124: Added reference to sh:group in the prose

shacl/index.html

@@ -2408,7 +2408,7 @@ <h4>Non-Validating Constraint Characteristics</h4>
 						properties with smaller order are placed above (or to the left) of properties with larger order.
 					</p>
 					<p id="group">
-						Property constraints may point at an instance of the class <code>sh:PropertyGroup</code> to indicate that
+						Property constraints may point at an instance of the class <code>sh:PropertyGroup</code> using the property <code>sh:group</code> to indicate that
 						the constraint belongs to a group of related property constraints.
 						Each group may have additional triples that serve application purposes, such as an <code>rdfs:label</code> for form building.
 						Groups may also have an <code>sh:order</code> property to indicate the relative ordering of groups within the same form.