fix(homepage): restricted width on mobile

as reported in
nostr:nevent1qvzqqqqqqypzptssprfrjv9hwmqcpyhka26pujcflnelq0ekgxcmfehw82skd4mqqy88wumn8ghj7mn0wvhxcmmv9uq32amnwvaz7tmjv4kxz7fwv3sk6atn9e5k7tcqyrhp9z9j62llalp7j7ljhtkkr44j2ru24klh6wmfuhce8465pxavxtn8wk0

src/routes/+page.svelte

@@ -156,7 +156,7 @@
     <a href="/about" class="btn btn-secondary text-right">learn more</a>
     <h2>Example Repositories</h2>
     <p>These repositories have plenty of issues and proposals to explore</p>
-    <div class="not-prose w-[64rem]">
+    <div class="not-prose lg:w-[64rem]">
       <ReposSummaryList repos={$example_repos} loading={false} />
     </div>
     <a href="/repos" class="btn btn-primary mt-9">List More Repositories</a>