Update range-lastcell.md

Author: JarbasHorst

api-reference/beta/api/range-lastcell.md

@@ -13,7 +13,7 @@ Namespace: microsoft.graph
 
 [!INCLUDE [beta-disclaimer](../../includes/beta-disclaimer.md)]
 
-Get the last cell within the range. For example, the last cell of "B2:D5" is "D5".
+Get the last cell within the range. For example, the last cell of *B2:D5* is *D5*.
 
 [!INCLUDE [national-cloud-support](../../includes/global-us.md)]