docs: fix V5 Docs show a LayoutArea.Menu value but the value does not exist

[marqdouj]

🙋 Documentation Request

On the V5 Migration page it shows LayoutArea.Menu which does not exist:

<FluentLayout>
   <FluentLayoutItem Area="LayoutArea.Header">Header</FluentLayoutItem>
   <FluentLayoutItem Area="LayoutArea.Menu">Menu</FluentLayoutItem>
   <FluentLayoutItem Area="LayoutArea.Content">Content</FluentLayoutItem>
   <FluentLayoutItem Area="LayoutArea.Aside">Aside</FluentLayoutItem>
   <FluentLayoutItem Area="LayoutArea.Footer">Footer</FluentLayoutItem>
</FluentLayout>

💁 Possible Solution

[vnbaaij]

Already addressed. See #4855

[marqdouj]

Great, thank you.