Add missing </p> in index.html

static/index.html

@@ -31,7 +31,7 @@
       </div>
     </div>
     <footer class="signature">
-      <p><a href="https://galene.org/">Galène</a> by <a href="https://www.irif.fr/~jch/" rel="author">Juliusz Chroboczek</a>
+      <p><a href="https://galene.org/">Galène</a> by <a href="https://www.irif.fr/~jch/" rel="author">Juliusz Chroboczek</a></p>
     </footer>
     
     <script src="/mainpage.js" defer></script>