Fix prettier formatting in upgrading-past-6-7-0.md

Co-authored-by: kategengler <[email protected]>

Author: Copilot

docs/upgrading-past-6-7-0.md

@@ -47,6 +47,7 @@ Re-run `ember-cli-update` after that.
 Use [ember-vite-codemod][mod] to upgrade your project. Then see [Already on Vite].
 
 ## Already on Vite
+
 [Already on Vite]: #already-on-vite
 
 You will also need to update
@@ -81,5 +82,4 @@ You will also need to update
 
 Re-run `ember-cli-update` after that.
 
-
 [mod]: https://github.com/mainmatter/ember-vite-codemod/