Update README.md

Author: zhonghong322

README.md

@@ -12,3 +12,4 @@ This repository is used to store download links for firmware.
 | Femto Mega I       | [Femto Mega I Firmware](https://github.com/orbbec/OrbbecFirmware/releases/tag/Femto-Mega-I-Firmware) |     v2.0.2       |
 | Gemini 330 series  |  [Gemini 330 series Firmware](https://www.orbbec.com/docs/g330-firmware-release/?_gl=1)   |          |
 | Gemini 215       | [Gemini 215](https://github.com/orbbec/OrbbecFirmware/releases/tag/Gemini215-Firmware) |     v1.0.9       |
+| Gemini 210       | [Gemini 210](https://github.com/orbbec/OrbbecFirmware/releases/tag/Gemini215-Firmware) |     v1.0.9       |