update aio post with similar predef for external pins

Author: brentru

examples/esp32spi_aio_post.py

@@ -15,12 +15,12 @@
     print("WiFi secrets are kept in secrets.py, please add them there!")
     raise
 
-# for externally connected ESP32
+# If you have an externally connected ESP32:
 esp32_cs = DigitalInOut(board.D9)
 esp32_ready = DigitalInOut(board.D10)
 esp32_reset = DigitalInOut(board.D5)
 
-# For PyPortal use
+# If you are using a board with pre-defined ESP32 Pins:
 """
 esp32_cs = DigitalInOut(board.ESP_CS)
 esp32_ready = DigitalInOut(board.ESP_BUSY)
@@ -57,4 +57,4 @@
         wifi.reset()
         continue
     response = None
-    time.sleep(15)
+    time.sleep(15)