Bump Adafruit NeoPixel to 1.15.1

Author: github-actions[bot]

platformio.ini

@@ -124,7 +124,7 @@ build_partitions = min_spiffs.csv
 build_partitions_debug = min_spiffs_debug.csv
 build_partitions_16mb = openevse_16mb.csv
 
-neopixel_lib = adafruit/Adafruit NeoPixel@1.14.0
+neopixel_lib = adafruit/Adafruit NeoPixel@1.15.1
 ws2812fx_lib = kitesurfer1404/[email protected]
 
 gfx_display_libs =