fixed typo

Author: sommersoft

adafruit_trellis/trellis_set.py

@@ -24,7 +24,7 @@
 #  CircuitPython Library Author: Michael Schroeder(sommersoft). No
 #  affiliation to Adafruit is implied.
 """
-`adafruit_trellis.tellis_set` - Adafruit Trellis Monochrome 4x4 LED Backlit Keypad
+`adafruit_trellis.trellis_set` - Adafruit Trellis Monochrome 4x4 LED Backlit Keypad
 ===================================================================================
 
 CircuitPython library to support Adafruit's Trellis Keypad.