Update readme.md

Author: mysterywolf

readme.md

@@ -9,7 +9,7 @@
 
 - RT-Thread操作系统的μCOS-III兼容层：https://github.com/mysterywolf/RT-Thread-wrapper-of-uCOS-III
 - RT-Thread操作系统的μCOS-II兼容层：https://github.com/mysterywolf/RT-Thread-wrapper-of-uCOS-II
-- RT-Thread操作系统的RTX(即CMSIS-RTOS)兼容层：https://github.com/RT-Thread-packages/CMSIS_RTOS1
+- RT-Thread操作系统的RTX(即CMSIS-RTOS1)兼容层：https://github.com/RT-Thread-packages/CMSIS_RTOS1
 - RT-Thread操作系统的RTX5(即CMSIS-RTOS2)兼容层：https://github.com/RT-Thread-packages/CMSIS_RTOS2
 - RT-Thread操作系统的Arduino生态兼容层：https://github.com/RTduino/RTduino