Add "Ground station only" to database step

Author: camspec

docs/src/content/docs/start-here/initial-setup.mdx

@@ -60,5 +60,5 @@ Follow Microsoft's official guide to install WSL: https://learn.microsoft.com/en
     pre-commit install
     ```
 
-6. Finally, setup the PostgreSQL database with the [Database setup](/OBC-firmware/start-here/database-setup) guide.
+6. **Ground station only:** Setup the PostgreSQL database with the [Database setup](/OBC-firmware/start-here/database-setup) guide.
 </Steps>