fix: Missing link in Lazy Loading docs (#84473)

Add missing space before "Importing Client Components" in Lazy Loading
/app docs.

This fixes the missing link in "On this page" sidebar:

<img width="1092" height="446" alt="image"
src="https://github.com/user-attachments/assets/0981467d-ad61-494d-80b2-c0a0e323dd0b"
/>

In the current state, the first link is "Skipping SSR" (second link)
instead of "Importing Client Components"

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

Author: joao4xz

docs/01-app/02-guides/lazy-loading.mdx

@@ -24,6 +24,7 @@ By default, Server Components are automatically [code split](https://developer.m
 ## Examples
 
 <AppOnly>
+
 ### Importing Client Components
 
 ```jsx filename="app/page.js"