Bug#645859: freedink-dfarc: typo in long description

[Olly Betts]

Package: freedink-dfarc
Version: 3.6-1
Severity: minor

Description: frontend and .dmod installer for GNU FreeDink
 DFArc2 makes it easy to play and manage the Dink Smallwood game and
 it's numerous Dink Modules (or D-Mods).

s/it's/its/

Cheers,
    Olly