mycobotpro630.py: Improve docstring

Author: Leonid Fedorenchik

pymycobot/mycobotpro630.py

@@ -482,6 +482,7 @@ def __init__(self, debug=False, do_init=True):
 
         Args:
             debug (bool, optional): Debug mode of logging (log with debug). Defaults to False.
+            do_init (bool, optional): if True will initialize robot, otherwise will skip  initialization.
         """
         self.c = elerob.command()
         self.s = elerob.stat()