Added one newline I have missed in the first iteration

Author: GeniusTimo

docs/developer-tools/game-sdk.mdx

@@ -6,6 +6,7 @@
 **The Game SDK has been archived.**
 
 We recommend using the [Discord Social SDK](/docs/discord-social-sdk/overview) for new projects.
+
 Existing projects using the Game SDK will continue to work, but we encourage you to migrate to the [Discord Social SDK](/docs/discord-social-sdk/overview) for new features and updates.
 :::