Update IETF-RFC.md

Co-authored-by: Giuseppe Lo Presti <[email protected]>

Author: mickenordin

IETF-RFC.md

@@ -111,7 +111,7 @@ take on: the _Sending Server_ role and the _Receiving Server_ role.
 
 A Sending Server is an OCM Provider that holds Resources and exposes
 APIs to allow access to them.  It allows its users to create _Shares_
-to give other users access to those Resources. A Sending Server MAY
+to give other users access to those Resources.  A Sending Server MAY
 provide its users with the ability to generate _Invites_ to establish
 contact with other users on other OCM Providers. When doing so it MAY
 provide a _WAYF Page_ to facilitate the Invite Flow. The WAYF page MAY