Update F# language link

Author: ghogen

docs/index.yml

@@ -99,7 +99,7 @@ tools:
       url: /dotnet/csharp 
     - title: F# 
       imageSrc: https://docs.microsoft.com/media/logos/logo_Fsharp.svg
-      url: ide/quickstart-fsharp.md
+      url: /dotnet/fsharp
     - title: Visual Basic
       imageSrc: https://docs.microsoft.com/media/logos/logo_VB.svg
       url: /dotnet/visual-basic