Update pricing info on Fork GUI

https://git-fork.com/buy

Author: jwright-lgs

data/guis/fork.yml

@@ -6,7 +6,7 @@ platforms:
   - "Windows"
   - "Mac"
 # No details on the evaluation limits or terms
-price: "$49.99 (Free evaluation)"
+price: "$59.99 (Free evaluation)"
 license: "Proprietary"
 trend_name: "Fork Git client"
 order: 12