make webring page

This webring page references another page's CSS rather than making its
own.

It has one link, to Tilde.zone.

index.html

@@ -68,7 +68,7 @@
       <span class="links">
         <a href="https://creativecommons.org/licenses/by-nc-sa/4.0/"><img src="/img/cc-light.svg"
             alt="CreativeCommons"></a>
-        <a href=""><img src="/img/w-light.svg" alt="Webring"></a>
+        <a href="/pages/webring.html"><img src="/img/w-light.svg" alt="Webring"></a>
         <a href="https://gitea.dmz.rs/eline/decentrala-website-static-new"><img src="/img/git-light.svg"
             alt="SourceCode"></a>
         <a href="https://balkan.fedive.rs/@decentrala"><img src="/img/mastodon-light.svg" alt="Mastodon"></a>
@@ -78,4 +78,4 @@
   </footer>
 </body>
 
-</html>
+</html>