add NEWOPTO XYC-ALS21C-K1

Author: koendv

0x30-0x3F.md

@@ -49,6 +49,7 @@
 - [Adafruit Stemma QT Rotary Encoder with NeoPixel](https://www.adafruit.com/product/4991) (0x36 - 0x3D)
 - [NeoKey 1x4 Four Mechanical Key Switches with NeoPixels](https://www.adafruit.com/product/4980) (0x30-0x3F)
 - [NeoSlider Slide Potentiometer with 4 NeoPixels](https://www.adafruit.com/product/5295) (0x30-0x3F)
+- [NEWOPTO XYC-ALS21C-K1 Ambient light sensor](https://www.lcsc.com/datasheet/lcsc_datasheet_2410121701_NEWOPTO-XYC-ALS21C-K1_C2988725.pdf) (0x30-0x3F)
 
 ## 0x39