Update sveltekit.tsx - to svelte 5 syntax (#1986)

* Update sveltekit.tsx - to svelte 5 syntax

In Svelte 5, content can be passed to components in the form of snippets and rendered using render tags.

In legacy mode, content inside component tags is considered slotted content, which can be rendered by the component using a <slot> element

https://svelte.dev/docs/svelte/legacy-slots

---------

Co-authored-by: Philipp Spiess <hello@philippspiess.com>

Author: dei8bit

src/app/(docs)/docs/installation/framework-guides/sveltekit.tsx

@@ -98,11 +98,12 @@ export let steps: Step[] = [
       lang: "svelte",
       code: html`
         <script>
+          let { children }  = $props();
           // [!code highlight:2]
           import "../app.css";
         </script>
 
-        <slot />
+        {@render children()}
       `,
     },
   },