chore: tidy up index.html (#142)

Author: github-actions[bot]

index.html

@@ -326,8 +326,9 @@ <h2>
       </h2>
       <p>
         This specification defines a [=policy-controlled feature=] identified
-        by the string <dfn class="permission">"digital-credentials-get"</dfn>. 
-        Its [=policy-controlled feature/default allowlist=] is [=allowlist/'self'=].
+        by the string <dfn class="permission">"digital-credentials-get"</dfn>.
+        Its [=policy-controlled feature/default allowlist=] is
+        [=allowlist/'self'=].
       </p>
     </section>
     <h2 id="protocol-registry">