Fix type err.

Author: Metaphorme

README.md

@@ -29,9 +29,9 @@ them**.
 
 ## Setup
 
-### Install from binary
+### Direct Binary Download
 
-Download suitable binary from [release](https://github.com/Metaphorme/ezcheck/releases/latest).
+Download the suitable **mix backend** binary from the [release](https://github.com/Metaphorme/ezcheck/releases/latest).
 
 ### Install from Cargo
 

README_zh.md

@@ -26,9 +26,9 @@ ezcheck 有三个后端：[ring](https://docs.rs/ring)，[hashes](https://docs.r
 
 ## 安装方法
 
-### 从二进制文件安装
+### 直接下载二进制程序
 
-从 [release](https://github.com/Metaphorme/ezcheck/releases/latest) 下载适合的二进制版本。
+从 [release](https://github.com/Metaphorme/ezcheck/releases/latest) 下载适合的**混合后端**二进制程序。
 
 ### 从 Cargo 安装