Sync kit docs (#1178)

sync kit docs

Co-authored-by: svelte-docs-bot[bot] <196124396+svelte-docs-bot[bot]@users.noreply.github.com>

Author: github-actions[bot]

apps/svelte.dev/content/docs/kit/98-reference/[email protected]

@@ -193,6 +193,12 @@ function json(
 
 ## normalizeUrl
 
+<blockquote class="since note">
+
+Available since 2.18.0
+
+</blockquote>
+
 Strips possible SvelteKit-internal suffixes and trailing slashes from the URL pathname.
 Returns the normalized URL as well as a method for adding the potential suffix back
 based on a new pathname (possibly including search) or URL.