docs: fix edit links (#9568)

fixes #9557

Author: Rich-Harris

sites/svelte.dev/src/routes/auth/login/+server.js

@@ -21,7 +21,7 @@ export const GET = client_id
 				<p>In order to use GitHub authentication, you will need to <a target="_blank" href="https://github.com/settings/developers">register an OAuth application</a> and create a local .env file:</p>
 				<pre>GITHUB_CLIENT_ID=[YOUR_APP_ID]\nGITHUB_CLIENT_SECRET=[YOUR_APP_SECRET]\nBASEURL=http://localhost:5173</pre>
 				<p>The <code>BASEURL</code> variable should match the callback URL specified for your app.</p>
-				<p>See also <a target="_blank" href="https://github.com/sveltejs/svelte/tree/master/site#repl-github-integration">here</a></p>
+				<p>See also <a target="_blank" href="https://github.com/sveltejs/svelte/tree/svelte-4/sites/svelte.dev#repl-github-integration">here</a></p>
 			</body>
 		`,
 				{

sites/svelte.dev/src/routes/docs/[slug]/+page.svelte

@@ -25,7 +25,7 @@
 <div class="text" id="docs-content" use:copy_code_descendants>
 	<a
 		class="edit"
-		href="https://github.com/sveltejs/svelte/edit/master/documentation/docs/{data.page.file}"
+		href="https://github.com/sveltejs/svelte/edit/svelte-4/documentation/docs/{data.page.file}"
 	>
 		<Icon size={50} name="edit" /> Edit this page on GitHub
 	</a>

sites/svelte.dev/src/routes/tutorial/[slug]/+page.svelte

@@ -47,7 +47,7 @@
 	$: if (scrollable) data.tutorial, scrollable.scrollTo(0, 0);
 
 	$: selected = lookup.get(data.slug);
-	$: improve_link = `https://github.com/sveltejs/svelte/tree/master/documentation/tutorial/${data.tutorial.dir}`;
+	$: improve_link = `https://github.com/sveltejs/svelte/tree/svelte-4/documentation/tutorial/${data.tutorial.dir}`;
 
 	const clone = (file) => ({
 		name: file.name.replace(/.\w+$/, ''),