Update docs/Whats-New.md

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: TaranDahl

docs/Whats-New.md

@@ -545,7 +545,7 @@ New:
 - [Taunt warhead](New-or-Enhanced-Logics.md#taunt-warhead) (by TaranDahl)
 - [Custom hover vehicles shutdown drowning death](New-or-Enhanced-Logics.md#custom-hover-vehicles-shutdown-drowning-death) (by FlyStar)
 - [SHP turret vehicles support the use of `*tur.shp` files](New-or-Enhanced-Logics.md#independent-shp-vehicle-turret-files) (by FlyStar)
-- [Export interface for external call](../README.md#interoperability) (by TaranDahl)
+- [Export interface for external call](index.md#interoperability) (by TaranDahl)
 
 Vanilla fixes:
 - Fixed sidebar not updating queued unit numbers when adding or removing units when the production is on hold (by CrimRecya)