doc: Fix quickstart since the login is not required and quit exists

Signed-off-by: Alan C. Assis <acassis@gmail.com>
diff --git a/Documentation/quickstart/configuring.rst b/Documentation/quickstart/configuring.rst
index 4ff4258..0db7405 100644
--- a/Documentation/quickstart/configuring.rst
+++ b/Documentation/quickstart/configuring.rst
@@ -33,18 +33,17 @@
 
     .. code-block:: console
 
-       $ make clean; make
+       $ make clean
+       $ make -j
        $ ./nuttx
-       login: admin
-       password: Administrator
        User Logged-in!
        nsh>
 
-   From another terminal window, kill the simulator:
+   You can explore the nsh typing ``help`` or ``?``. Then to leave you can run:
 
     .. code-block:: console
 
-       $ pkill nuttx
+       nsh> quit
 
 #. Modify configuration