Update mg_add_sock.md

docs/c-api/net.h/mg_add_sock.md

@@ -6,8 +6,8 @@ signature: |
   struct mg_connection *mg_add_sock(struct mg_mgr *, sock_t, mg_event_handler_t);
 ---
 
-Create a connection, associate it with the given socket and event handler,
-and add it to the manager.
+Creates a connection, associates it with the given socket and event handler
+and adds it to the manager.
 
 For more options see the `mg_add_sock_opt` variant.