web: fix: print OU only if not empty

webroot/index.html

@@ -176,7 +176,7 @@
                             </small>
                         </td>
                         <td>
-                            {{entry.cn}} ({{entry.ou}})</b><br/> <!-- TODO !!! ifSet-->
+                            {{entry.cn}} <span v-if="entry.ou">({{entry.ou}})</span></b><br/>
                             <a v-bind:href="'https://api.ca.kit.edu/redirect/getcert/' + entry.serial">
                                 <small>S/N: {{entry.serial}}</small>
                             </a>