Update README.md

Author: flash62au

README.md

@@ -672,7 +672,7 @@ To change the configuration so that rotating the encoder clockwise increases spe
 ### Direction of rotation of the encoder when the Loco is reversed
 
 By default, when the loco is reversed, to increase the speed of the loco you need to rotate the encoder in the same direction as when the loco direction is forward.  (See the previous heading.)
-If you wish to increase speed by rotating the encoder in the oposite direction when the direction is reverse' you can add the following define.  Uncomment (remove the ``//``) following line in your ``config_buttons.h``.
+If you wish to increase speed by rotating the encoder in the opposite direction when the direction is reversed you can add the following define.  Uncomment (remove the ``//``) following line in your ``config_buttons.h``.
 
 ``#define ENCODER_INVERT_ROTATION_WHEN_REVERSED                     true``