Update index.html

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

Author: marcoscaceres

index.html

@@ -299,7 +299,7 @@ <h3>
       </li>
       <li>[=Set/For each=] |n| of the |range|:
         <ol>
-          <li>Let |provider| be [=list/item=] at |providers|'s |n| index.
+          <li>Let |provider| be the [=list/item=] at |providers|'s |n| index.
           </li>
           <li>If |provider|'s {{DigitalCredentialsProvider/protocol}} does not
           match a [=digital credentials registry/protocol identifier=] from the