Add a link on legato.io's runtime page to point to KConfig's for external watchdog
Add a link on legato.io's runtime page to point to KConfig's for external watchdog

This helps to link the former page to the latter page to make it more accessible &
directly associated.

Resolves: FIREBIRD-287
Change-Id: I515f05f52a4946186dd117966afc00b63d073872

legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af