Update proposals/4186-simplified-sliding-sync.md

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

proposals/4186-simplified-sliding-sync.md

@@ -112,8 +112,8 @@ the room's index in the filtered list is within the list's range.
 #### Activity ordering
 
 Rooms are ordered by last activity, based on when the last event in the room was received by the server. The exact
-ordering is determined by the server implementation. (Typically, this would be essentially based on when the "server
-received" the last event in the room, however the precise definition depends on the server architecture, especially for
+ordering is determined by the server implementation. (Typically, this would be essentially based on when the server
+received the last event in the room, however the precise definition depends on the server architecture, especially for
 servers that are "distributed").
 
 > [!Important]