fixing typo

Co-authored-by: Derpius <49565664+Derpius@users.noreply.github.com>

Author: atilafassina

src/routes/solid-start/migrating-from-v1.mdx

@@ -22,7 +22,9 @@ Please note that some third-party packages may not be compatible with v2 yet.
 
 ### Update dependencies
 
+```package-install
 @solidjs/start@2.0.0-alpha.2 @solidjs/vite-plugin-nitro-2 vite@7
+```
 
 ```package-remove
 vinxi