Update index.html

Co-authored-by: Ted Thibodeau Jr <tthibodeau@openlinksw.com>

Author: marcoscaceres

index.html

@@ -397,9 +397,9 @@ <h2 id="protocol-registry">
       Registry of protocols for requesting digital credential
     </h2>
     <p>
-      The following are <dfn data-lt="digital credentials registry">exchange
-      protocols from the digital credentials registry</dfn>, supported by this
-      specification.
+      The following <dfn data-lt="digital credentials registry">exchange
+      protocols from the digital credentials registry</dfn> are supported by
+      this specification.
     </p>
     <p class="note" title="Official Registry" data-cite="w3c-process">
       It is expected that this registry will be become a [=W3C registry=] in