Apply suggestions from code review

Co-authored-by: Ted Thibodeau Jr <tthibodeau@openlinksw.com>
Co-authored-by: Mohamed Amir Yosef <mohamed.amir@gmail.com>

Author: 3 people

index.html

@@ -349,8 +349,8 @@ <h3>
     </h3>
     <p>
       A <dfn>digital credential client</dfn> is a user-agent-defined component
-      responsible managing the credential presentation or issuance flow, which 
-      includes allowing a user to select from available [=holders=] and coordinating the request.
+      responsible for managing the credential presentation or issuance flow, which 
+      includes allowing the user to select from available [=holders=] and coordinating the request.
     </p>
     <p>
       Each [=credential request coordinator=] uses a single associated