Documentation: typec.rst: Use literal-block element with ascii art

Using reStructuredText literal-block element with ascii-art.
That prevents the ascii art from being processed as
reStructuredText.

Reported-by: Masanari Iida <[email protected]>
Fixes: bdecb33 ("usb: typec: API for controlling USB Type-C Multiplexers")
Signed-off-by: Heikki Krogerus <[email protected]>
Reviewed-by: Jani Nikula <[email protected]>
Tested-by: Jani Nikula <[email protected]>
Reported-by: Hans de Goede <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>

Author: Heikki Krogerus

Documentation/driver-api/usb/typec.rst

@@ -210,7 +210,7 @@ If the connector is dual-role capable, there may also be a switch for the data
 role. USB Type-C Connector Class does not supply separate API for them. The
 port drivers can use USB Role Class API with those.
 
-Illustration of the muxes behind a connector that supports an alternate mode:
+Illustration of the muxes behind a connector that supports an alternate mode::
 
                      ------------------------
                      |       Connector      |