Add a missing closing '>' on an HTML open tag

src/sidebar/templates/annotation.html

@@ -42,7 +42,7 @@
       <markdown-view
         markdown="vm.state().text"
         text-class="{'annotation-body is-hidden':vm.isHiddenByModerator(),
-                     'has-content':vm.hasContent()}"
+                     'has-content':vm.hasContent()}">
       </markdown-view>
     </excerpt>
     <markdown text="vm.state().text"