Update index.html

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

Author: marcoscaceres

index.html

@@ -308,7 +308,7 @@ <h3>
       </li>
       <li>[=List/For each=] |provider| in |providers|:
         <ol>
-          <li>If |provider|'s {{DigitalCredentialsProvider/protocol}} is does
+          <li>If |provider|'s {{DigitalCredentialsProvider/protocol}} does
           not match a [=digital credentials registry/protocol identifier=] from
           the [=digital credentials registry=], [=exception/throw=] a
           {{TypeError}}.