Update from code review.

Co-authored-by: Roberto Polli <[email protected]>

Author: gkellogg

spec/index.html

@@ -362,7 +362,7 @@ <h3>application/ld+yaml</h3>
         </dl>
       </dd>
       <dt>Encoding considerations:</dt>
-      <dd>See <a data-cite="RFC8259#section-11">RFC&nbsp;8259, section 11</a>.</dd>
+      <dd>See <a data-cite="I-D.ietf-httpapi-yaml-mediatypes">YAML media type</a>.</dd>
       <dt id="iana-security">Security considerations:</dt>
       <dd>See <a href="#sec" class="sectionRef"></a>.</dd>
       <dt>Interoperability considerations:</dt>