Update range-lastcolumn.md

Author: JarbasHorst

api-reference/v1.0/api/range-lastcolumn.md

@@ -11,7 +11,7 @@ doc_type: apiPageType
 
 Namespace: microsoft.graph
 
-Get the last column within the range. For example, the last column of "B2:D5" is "D2:D5".
+Get the last column within the range. For example, the last column of *B2:D5* is *D2:D5*.
 
 [!INCLUDE [national-cloud-support](../../includes/global-us.md)]