Add missing close of abbr HTML tag

Author: flashcode

weechat/templates/doc/security.html

@@ -115,7 +115,7 @@ <h4>
         <th>{% trans "Vulnerability type" %}</th>
         <th class="text-nowrap">{% trans "Scope" %}</th>
         <th><abbr title="{% trans "Affected versions" %}">{% trans "Versions" %}</abbr></th>
-        <th><abbr title="{% trans "Fixed version" %}">{% trans "Fix" %}</th>
+        <th><abbr title="{% trans "Fixed version" %}">{% trans "Fix" %}</abbr></th>
         <th>{% trans "Release date" %}</th>
       </tr>
     </thead>