fix: change link from markdown to HTML

Author: evanp

draft-extensions-policy.html

@@ -255,7 +255,7 @@ <h2>Criteria</h2>
       <p>Extensions to be included MAY meet these criteria:</p>
       <ul>
         <li>
-          A security review, either by the submitter, members of the SocialCG, or by the [SecurityIG](https://www.w3.org/Security/wiki/IG/W3C_spec_review).
+          A security review, either by the submitter, members of the SocialCG, or by the <a href="https://www.w3.org/Security/wiki/IG/W3C_spec_review">SecurityIG]</a>.
         </li>
         <li>
           A privacy review, either by the submitter, members of the SocialCG, or others.