Update components/libc/cplusplus/Kconfig

Author: mysterywolf

components/libc/cplusplus/Kconfig

@@ -5,7 +5,7 @@ menuconfig RT_USING_CPLUSPLUS
 if RT_USING_CPLUSPLUS
 
     config RT_USING_CPP_MULTITHREAD
-        bool "Enable RT-Thread C++ thread feature support"
+        bool "Enable RT-Thread C++ multi-threads feature support"
         default n
 
     config RT_USING_CPLUSPLUS11