Update example reference with links

Author: malcolm-sparkfun

examples/README.md

@@ -9,23 +9,29 @@ This script sets up a GPIO 0 as an output and toggles
 
    This device sinks current. When an output is LOW then current will flow.
 
+The key methods showcased by this example are:
+-[pinMode()](https://docs.sparkfun.com/qwiic_gpio_py/classqwiic__gpio_1_1_qwiic_g_p_i_o.html#a88956a5327174e453c9f247ae7ea2a07)
+-[digitalWrite()](https://docs.sparkfun.com/qwiic_gpio_py/classqwiic__gpio_1_1_qwiic_g_p_i_o.html#a4cd696748424967345528fabe4fc22fa)
+
 ## Qwiic Gpio Ex1B Write Port
 This script flips all 8 outputs on and off every second.
+-[pinModePort()](https://docs.sparkfun.com/qwiic_gpio_py/classqwiic__gpio_1_1_qwiic_g_p_i_o.html#a0f80b0d4eb2872e5bbdd1eefffcf04cc)
+-[digitalWritePort()](https://docs.sparkfun.com/qwiic_gpio_py/classqwiic__gpio_1_1_qwiic_g_p_i_o.html#a52c93eb9bb28236c9b6fffe3456e2249)
 
 ## Qwiic Gpio Ex2A Read
 This script allows the user to read a value from GPIO 0
- ------------------------------------------------------------------------
+-[digitalRead()](https://docs.sparkfun.com/qwiic_gpio_py/classqwiic__gpio_1_1_qwiic_g_p_i_o.html#a98403a1293a99ff4411cc6a4cca5e691)
 
 ## Qwiic Gpio Ex2B Read Port
 This script allows the user to read the status of all 8 GPIO simultaneously
- ------------------------------------------------------------------------
+-[digitalReadPort()](https://docs.sparkfun.com/qwiic_gpio_py/classqwiic__gpio_1_1_qwiic_g_p_i_o.html#a6d86c74b1969a08272de93aeaeb128c5)
 
 ## Qwiic Gpio Ex3A Inversion
 This script shows how to invert the input signal on a pin
- ------------------------------------------------------------------------
+-[invertPin()](https://docs.sparkfun.com/qwiic_gpio_py/classqwiic__gpio_1_1_qwiic_g_p_i_o.html#af3e28ee15c8bf6dd94d307f3d05c5430)
 
 ## Qwiic Gpio Ex3B Inversion Port
 This script shows how to invert the input signal on multiple pins
- ------------------------------------------------------------------------
+-[invertPinPort()](https://docs.sparkfun.com/qwiic_gpio_py/classqwiic__gpio_1_1_qwiic_g_p_i_o.html#a9540c7dbd1b6b10191cf3f7aed9c91b1)