Added commented out board.STEMMA_I2C with explanation

Author: evaherrada

examples/24lc32_simpletest.py

@@ -5,7 +5,8 @@
 import board
 import adafruit_24lc32
 
-i2c = board.I2C()
+i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 eeprom = adafruit_24lc32.EEPROM_I2C(i2c)
 
 print("length: {}".format(len(eeprom)))