Update dialog.mdx

Author: iansummerlin

docs/documentation/components/dialog.mdx

@@ -216,7 +216,7 @@ Use the `onBeforeClose` prop to handle overlay/close clicks. It is executed
 when dialog is about to close. Return `false` to prevent the sheet from closing.
 
 ```jsx
-function PreserveBodyScrollingDialogExample() {
+function OnBeforeCloseExample() {
   const [isShown, setIsShown] = React.useState(false)
 
   return (