Update lcd_gpio.svg (#3330)

* Update lcd_gpio.svg

Correct labeling of D0-D3 as 4-bit, when the correct pins to
use for 4-bit data are D4-D7, as per https://github.com/duinoWitchery/hd44780/blob/master/examples/ioClass/hd44780_pinIO/HelloWorld/HelloWorld.ino#L24-L27

* Update pin examples to use GPIO instead of D

components/display/lcd_display.rst

@@ -90,10 +90,10 @@ faster refresh, especially in conjunction with an :ref:`LCD Menu <lcd_menu>`.
       - platform: lcd_gpio
         dimensions: 20x4
         data_pins:
-          - D0
-          - D1
-          - D2
-          - D3
+          - GPIO32
+          - GPIO33
+          - GPIO5
+          - GPIO17
         enable_pin: D4
         rs_pin: D5
         lambda: |-