update changelog

CHANGELOG.md

@@ -12,6 +12,7 @@
 * [#6054](https://github.com/xmake-io/xmake/issues/6054): Add xmake bundle for linux
 * [#6071](https://github.com/xmake-io/xmake/issues/6071): Improve to download package for git url, support for sparse-checkout
 * [#5163](https://github.com/xmake-io/xmake/issues/5163): Support TI-CGT C2000/C6000 compiler
+* [#5344](https://github.com/xmake-io/xmake/issues/5344): Support IAR ARM C/C++ compiler
 * [#5554](https://github.com/xmake-io/xmake/issues/5554): Add custom unknown toolchains support
 
 ### Changes
@@ -1952,6 +1953,7 @@
 * [#6054](https://github.com/xmake-io/xmake/issues/6054): 为 linux 添加 xmake bundle 包
 * [#6071](https://github.com/xmake-io/xmake/issues/6071): 改进 git 包下载，支持仅仅 clone 指定子目录
 * [#5163](https://github.com/xmake-io/xmake/issues/5163): 支持 TI-CGT C2000/C6000 编译器
+* [#5344](https://github.com/xmake-io/xmake/issues/5344): 支持 IAR ARM C/C++ 编译器
 * [#5554](https://github.com/xmake-io/xmake/issues/5554): 添加自定义未知工具链支持
 
 ### 改进

README.md

@@ -248,6 +248,7 @@ cosmocc       build-once run-anywhere
 hdk           Harmony SDK
 ti-c2000      TI-CGT C2000 compiler
 ti-c6000      TI-CGT C6000 compiler
+iararm        IAR ARM C/C++ Compiler
 ```
 
 ## Supported languages

README_zh.md

@@ -309,6 +309,7 @@ cosmocc       build-once run-anywhere
 hdk           Harmony SDK
 ti-c2000      TI-CGT C2000 compiler
 ti-c6000      TI-CGT C6000 compiler
+iararm        IAR ARM C/C++ Compiler
 ```
 
 ## 支持语言