docs: update commands in devstack readme instructions (openedx#357)

README.rst

@@ -89,7 +89,7 @@ Follw these steps to provision, run, and enable an instance of the Library Autho
 
    .. code-block::
 
-      make studio-shell
+      make dev.shell.cms
       vim /edx/etc/studio.yml
       ---
       FEATURES:
@@ -99,7 +99,7 @@ Follw these steps to provision, run, and enable an instance of the Library Autho
 
    .. code-block::
 
-      make studio-restart
+      make dev.restart-container.cms
 
 #. On a browser, go to http://localhost:18010/admin/waffle/flag/, log in as an admin (such as the sample user ``edx``)
    and create a ``studio.library_authoring_mfe`` waffle flag, and enabling it for everyone.