Fix: Adds inline to Fonts Tailwind v4 instructions (#11491)

Co-authored-by: Sarah Rainsberger <5098874+sarah11918@users.noreply.github.com>
Co-authored-by: TheOtterlord <64310361+TheOtterlord@users.noreply.github.com>
Co-authored-by: florian-lefebvre <69633530+florian-lefebvre@users.noreply.github.com>

Author: 4 people

src/content/docs/en/reference/experimental-flags/fonts.mdx

@@ -116,10 +116,10 @@ body {
 
     <TabItem label="Tailwind CSS 4.0">
 
-    ```css title="src/styles/global.css" ins={4}
+    ```css title="src/styles/global.css" ins={4} ins="inline"
     @import 'tailwindcss';
 
-    @theme {
+    @theme inline {
         --font-sans: var(--font-roboto);
     }
     ```