tip for new users

I've seen where users ran the script in a new folder then forgot to cd into `project` folder twice to run project commands. So this is a nice friendly tip for the end user.

src/content/docs/v4/reference/getting-started.mdx

@@ -12,3 +12,7 @@ import PackageManagers from '~/components/PackageManagers.astro';
 Once you've used this command, follow the interactive prompts to create your new project.
 
 If you need help, feel free to ask on our [Discord](https://sern.dev/discord).
+
+:::tip
+This script will create a new folder for the project so you don't have to manually create it first.
+:::