Sync kit docs (#952)

sync kit docs

Co-authored-by: Rich-Harris <1162160+Rich-Harris@users.noreply.github.com>

Author: github-actions[bot]

apps/svelte.dev/content/docs/kit/98-reference/10-@sveltejs-kit.md

@@ -2075,6 +2075,12 @@ type RequestHandler<
 
 ## Reroute
 
+<blockquote class="since note">
+
+Available since 2.3.0
+
+</blockquote>
+
 The [`reroute`](/docs/kit/hooks#Universal-hooks-reroute) hook allows you to modify the URL before it is used to determine which route to render.
 
 <div class="ts-block">

apps/svelte.dev/content/docs/kit/98-reference/15-@sveltejs-kit-node.md

@@ -15,6 +15,12 @@ import {
 
 ## createReadableStream
 
+<blockquote class="since note">
+
+Available since 2.4.0
+
+</blockquote>
+
 Converts a file on disk to a readable stream
 
 <div class="ts-block">

apps/svelte.dev/content/docs/kit/98-reference/20-$app-server.md

@@ -11,6 +11,12 @@ import { read } from '$app/server';
 
 ## read
 
+<blockquote class="since note">
+
+Available since 2.4.0
+
+</blockquote>
+
 Read the contents of an imported asset from the filesystem
 
 ```js