Merge pull request #7087 from songw4232/master

【修改】为README.md开发文档修改了Hifive为sifive描述

README.md

@@ -82,7 +82,7 @@ RT-Thread supports many architectures, and has covered the major architectures i
 - **ARM9**：manufacturers like Allwinner、Xilinx 、GOKE
 - **ARM11**：manufacturers like Fullhan
 - **MIPS32**：manufacturers like loongson、Ingenic
-- **RISC-V RV32E/RV32I[F]/RV64[D]**：manufacturers like Hifive、[Kendryte](https://github.com/RT-Thread/rt-thread/tree/master/bsp/k210)、[bouffalo_lab](https://github.com/RT-Thread/rt-thread/tree/master/bsp/bouffalo_lab)、[Nuclei](https://nucleisys.com/)、[T-Head](https://www.t-head.cn/)
+- **RISC-V RV32E/RV32I[F]/RV64[D]**：manufacturers like sifive、[Canaan Kendryte](https://github.com/RT-Thread/rt-thread/tree/master/bsp/k210)、[bouffalo_lab](https://github.com/RT-Thread/rt-thread/tree/master/bsp/bouffalo_lab)、[Nuclei](https://nucleisys.com/)、[T-Head](https://www.t-head.cn/)
 - **ARC**：manufacturers like SYNOPSYS
 - **DSP**：manufacturers like TI
 - **C-Sky**

README_zh.md

@@ -93,7 +93,7 @@ RT-Thread RTOS 支持许多架构，并且已经涵盖了当前应用中的主
 - ARM9：如芯片制造商Allwinner、Xilinx 、GOKE
 - ARM11：如芯片制造商Fullhan
 - MIPS32：如芯片制造商loongson、Ingenic
-- RISC-V RV32E/RV32I[F]/RV64[D]：如芯片制造商Hifive、[Kendryte](https://github.com/RT-Thread/rt-thread/tree/master/bsp/k210)、[博流](https://github.com/RT-Thread/rt-thread/tree/master/bsp/bouffalo_lab)、[芯来Nuclei](https://nucleisys.com/)、[平头哥T-Head](https://www.t-head.cn/)
+- RISC-V RV32E/RV32I[F]/RV64[D]：如芯片制造商sifive、[嘉楠Kendryte](https://github.com/RT-Thread/rt-thread/tree/master/bsp/k210)、[博流](https://github.com/RT-Thread/rt-thread/tree/master/bsp/bouffalo_lab)、[芯来Nuclei](https://nucleisys.com/)、[平头哥T-Head](https://www.t-head.cn/)
 - ARC：如芯片制造商SYNOPSYS
 - DSP：如芯片制造商 TI
 - C-Sky