Use D/C = pin9 and RST = pin8 to match Adafruit_SS7735R examples

This tiny & trivial change to the examples makes the 2.2 inch TFT connections the same as the 1.8 inch TFT product.  Consistency might be nice?

https://github.com/adafruit/Adafruit-ST7735-Library/blob/master/examples/graphicstest_highspeed/graphicstest_highspeed.pde#L22