Fixed missing tag.

spec.bs

@@ -972,7 +972,7 @@ A <dfn export>fenced frame config</dfn> is a [=struct=] with the following [=str
   : <dfn>embedder shared storage context</dfn>
   :: null, or a [=string=]
 
-  : <dfn>is ad component</dfn> 
+  : <dfn>is ad component</dfn>
   :: A [=boolean=]
 
   Note: When true, this [=fenced frame config=] reprsents an ad component. An ad component can be
@@ -981,6 +981,8 @@ A <dfn export>fenced frame config</dfn> is a [=struct=] with the following [=str
   Audience explainer</a>. For an ad component, event reporting is handled differently. See the <a
   href=https://github.com/WICG/turtledove/blob/main/Fenced_Frames_Ads_Reporting.md#support-for-ad-components>Fenced
   Frame Ads Reporting explainer</a> that describes this.
+
+</dl>
 
 <h4 id=fenced-frame-config-instance-struct>The [=fenced frame config instance=] [=struct=]</h4>
 
@@ -1024,7 +1026,7 @@ A <dfn export>fenced frame config instance</dfn> is a [=struct=] with the follow
   : <dfn>embedder shared storage context</dfn>
   :: null, or a [=string=]
 
-  : <dfn>is ad component</dfn> 
+  : <dfn>is ad component</dfn>
   :: A [=boolean=]
 </dl>
 
@@ -1111,7 +1113,7 @@ A <dfn export>fenced frame config instance</dfn> is a [=struct=] with the follow
     : [=fenced frame config instance/embedder shared storage context=]
     :: |config|'s [=fenced frame config/embedder shared storage context=]
 
-    : [=fenced frame config instance/is ad component=]  
+    : [=fenced frame config instance/is ad component=]
     :: |config|'s [=fenced frame config/is ad component=]
 </div>