bsp/nuclei: Add new bsp entry doc in README.md
# Nuclei RISC-V Processor Support Package
-This directory provided support for [Nuclei RISC-V Processor](https://nucleisys.com/) based board, currently
-we mainly provided the following support package.
+This directory provided support for [Nuclei RISC-V Processor](https://nucleisys.com/) based board,
+currently we mainly provided the following board support packages.
| **BSP** | **Development Board Name** |
| :----------------------------------- | :-------------------------------------------------------------------------------------------------------------------------- |
| [gd32vf103_rvstar](gd32vf103_rvstar) | [Nuclei RV-STAR Arduino Compatible Development Board](https://www.riscv-mcu.com/quickstart-quickstart-index-u-RV_STAR.html) |
+| [hbird_eval](hbird_eval) | [Nuclei HummingBird FPGA Evaluation Development Board](https://nucleisys.com/developboard.php) |
**If you want to learn more about Nuclei Processors, please click the following links:**
* [Professional RISC-V IPs](https://nucleisys.com/product.php)
+* [Nuclei Open Source Software Organization in Github](https://github.com/Nuclei-Software/)
+* [Nuclei Open Source Software Organization in Gitee](https://gitee.com/Nuclei-Software/)
+* [RISC-V MCU Open Source Software Organization in Github](https://github.com/riscv-mcu/)
+* [RISC-V MCU Open Source Software Organization in Gitee](https://gitee.com/riscv-mcu/)
* [Professional Nuclei Processor Development Boards](https://nucleisys.com/developboard.php)
* [Comprehensive Documents and Development Tools](https://nucleisys.com/download.php)
* [Active RISC-V IP and MCU Community](https://www.rvmcu.com/)
