docs(clayui.com): LPD-71044 Stop using deprecated label attribute

Author: pat270

packages/clay-drop-down/docs/drop-down.mdx

@@ -388,21 +388,21 @@ To render a cascading menu it is necessary to set the `type` of the item to `con
 
 ```js
 const items = [
-	{label: 'Folder'},
+	{title: 'Folder'},
 	{type: 'divider'},
 	{
 		items: [
-			{label: 'Basic Document'},
-			{label: 'Contract'},
-			{label: 'Marketing Banner'},
-			{label: 'Spreadsheet'},
-			{label: 'Presentation'},
+			{title: 'Basic Document'},
+			{title: 'Contract'},
+			{title: 'Marketing Banner'},
+			{title: 'Spreadsheet'},
+			{title: 'Presentation'},
 		],
-		label: 'Document',
+		title: 'Document',
 		type: 'contextual',
 	},
-	{label: 'Shortcut'},
-	{label: 'Repository'},
+	{title: 'Shortcut'},
+	{title: 'Repository'},
 ];
 ```