Update README.rst

Author: pylessard

README.rst

@@ -28,7 +28,7 @@ Example
    import SomeLib.SomeCar.SomeModel as MyCar
 
    import udsoncan
-   from udsoncan.connections import IsoTPConnection
+   from udsoncan.connections import IsoTPSocketConnection
    from udsoncan.client import Client
    from udsoncan.exceptions import *
    from udsoncan.services import *