Update mg_add_sock_opt.md

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

@@ -8,8 +8,8 @@ signature: |
                                         struct mg_add_sock_opts);
 ---
 
-Create a connection, associate it with the given socket and event handler,
-and add to the manager.
+Creates a connection, associates it with the given socket and event handler
+and adds to the manager.
 
 See the `mg_add_sock_opts` structure for a description of the options.