adding comments parade option

themes/nipponalba/layouts/_default/single.html

@@ -43,7 +43,7 @@
       <input value="Send Webmention" type="submit"/>
   </form>
   <p>Alternatively, if you do not have a webmentions enabled website then you can leave a message using the comments parade form below.</p>
-<details><summary>Comments Parade</summary><p>Please enter the following in the URL field below: {{.Permalink }}</p><embed type="text/html" class="commentparade" src="https://commentpara.de"></embed></details>
+<details><summary>Comments Parade</summary><p>Please enter the following in the URL field below: {{.Permalink }}</p><iframe type="text/html" class="commentparade" src="https://commentpara.de"></iframe></details>
 <p>All going well, comments will take a few minutes to appear, possibly longer due to .. gremlins.</p>
 </section>
 {{ $mention_ids := index $.Site.Data.index .RelPermalink }}