Add note about REPL in terminalio

Author: tekktrik

shared-bindings/terminalio/__init__.c

@@ -38,7 +38,12 @@
 //| """Displays text in a TileGrid
 //|
 //| The `terminalio` module contains classes to display a character stream on a display. The built
-//| in font is available as ``terminalio.FONT``."""
+//| in font is available as ``terminalio.FONT``.
+//|
+//| .. note:: This module does not give access to the
+//|     `REPL <https://learn.adafruit.com/welcome-to-circuitpython/interacting-with-the-serial-console>`_.
+//|
+//| """
 //|
 //| FONT: fontio.BuiltinFont
 //| """The built in font"""