docs: link to old site in welcoming directory

Author: benmccann

apps/svelte.dev/src/routes/docs/+page.svelte

@@ -71,17 +71,17 @@
 
 	<div class="options">
 		<a href="/tutorial">
-			<h2>I&rsquo;m brand new here</h2>
+			<h2>I'm brand new here</h2>
 			<p>
 				We recommend starting with the interactive tutorial, which will teach you how to use Svelte
 				right here in your browser.
 			</p>
 		</a>
 
 		<a href="/docs/svelte/v5-migration-guide">
-			<h2>I&rsquo;m migrating an app from Svelte 4</h2>
+			<h2>I'm migrating an app from Svelte 4</h2>
 			<p>
-				If you&rsquo;re already experienced with an older version of Svelte, the migration guide
+				If you're already experienced with an older version of Svelte, the migration guide
 				will bring you up to speed on the changes in Svelte 5.
 			</p>
 		</a>
@@ -102,6 +102,13 @@
 			</p>
 		</a>
 
+		<a href="https://v4.svelte.dev">
+			<h2>I'm looking for the old docs</h2>
+			<p>
+				If you're developing a site using only Svelte 3 or Svelte 4, the old site may be a helpful reference until you upgrade.
+			</p>
+		</a>
+
 		<a href="/chat" class="external">
 			<h2>Help! I'm stuck</h2>
 			<p>