fix: Fix a regression in ietf-tools#3625 (ietf-tools#3656)

Tag closed incorrectly.

Author: larseggert

ietf/templates/base.html

@@ -119,7 +119,7 @@
                     <div class="small text-muted p-3">
                         {% if version_num %}
 		                        <a href="/release/about">About</a>
-                            <a href="https://github.com/ietf-tools/datatracker/">IETF Datatracker<a>
+                            <a href="https://github.com/ietf-tools/datatracker/">IETF Datatracker</a>
 	                          <a href="/release/{{ version_num }}/">Version {{ version_num }}</a>
                 	          {{ revision_date }}
                         {% endif %}
@@ -152,4 +152,4 @@
             });
         </script>
     </body>
-</html>
+</html>