facilities: extend information about lost+found

The lost+found is nearly up and running and the info-page should reflect that :)

docs/facilities.md

@@ -74,6 +74,7 @@ Reach out if you are autistic and want to provide or receive mutual aid. [Also:
 See [Bars](drinks.md#bars) and [Crate Sale](drinks.md#crate-sale-and-crate-presale-pickup)
 
 ## Lost and Found
+The Lost and Found is located at the [Infodesk](facilities.md#infodesk). If you want to reach the lost+found after the event, you can do so under [camp23@c3lf.de](mailto:camp23@c3lf.de)
 
 ## Späti
 !!! danger "Attention"