feat: add new v1.5 raspberry pi 4b variants

adds newer raspberry pi 4b variants

Signed-off-by: Aaron Shaw <shawaj@gmail.com>

Author: shawaj

adafruit_platformdetect/constants/boards.py

@@ -444,7 +444,10 @@
         "b03114",
         "c03114",
         "d03114",
+        "a03115",
         "b03115",
+        "c03115",
+        "d03115",
         "1a03111",
         "2a03111",
         "1b03111",