Why there are two Tor Browser links in Workstation?
as stated here: https://forums.whonix.org/t/two-tor-browser-shortcuts-after-update/1775 this is no need to worry. They both do the exact same thing, so you may remove one. Not sure why this even happend though, though I presume it is in some way connected to the Whonix 12 upgrade.
Have a nice day,