Add link to platform docs

Author: catplat

sites/platform/config/_default/params.yaml

@@ -25,7 +25,7 @@ vendor:
         link: https://upsun.com/register/
         cta: Activate your 15-day trial
         title: Try Upsun for 15 days
-        description: "After that, enjoy the same game-changing Upsun features for less with the First Project Incentive!¹ A monthly $19 perk!"
+        description: "After that, enjoy the same game-changing Upsun features for less with the [First Project Incentive](https://upsun.com/blog/first-project-incentive/)!¹ A monthly $19 perk!"
         fine: "¹Terms and conditions apply. Only for Flexible Resource projects."
     config:
         version: 1