Origin added to internal links (#3310)

Task/Issue URL:
https://app.asana.com/0/1148564399326804/1208314251851763/f

**Description**:
Adding [origin
attribution](https://app.asana.com/0/1206716555947156/1206716715679835)
to all the links to the landing pages in our apps.

DuckDuckGo/Preferences/Model/PreferencesSection.swift

@@ -119,7 +119,7 @@ enum PreferencePaneIdentifier: String, Equatable, Hashable, Identifiable, CaseIt
     case autofill
     case accessibility
     case duckPlayer = "duckplayer"
-    case otherPlatforms = "https://duckduckgo.com/app"
+    case otherPlatforms = "https://duckduckgo.com/app?origin=funnel_app_macos"
     case about
 
     var id: Self {