docs: typo in page title (#61267)

Simple docs update, title on app router Static Assets page reads as
Statics Assets

Co-authored-by: Sam Ko <[email protected]>

Author: michaelpeterswa

docs/02-app/01-building-your-application/06-optimizing/11-static-assets.mdx

@@ -1,5 +1,5 @@
 ---
-title: Statics Assets in `public`
+title: Static Assets in `public`
 nav_title: Static Assets
 description: Next.js allows you to serve static files, like images, in the public directory. You can learn how it works here.
 ---