doc: yank

README.md

@@ -27,10 +27,10 @@ PDF scientific paper translation and bilingual comparison.
 
 ## Installation
 
-Require Python version >=3.8, <=3.11
+Require Python version <=3.12
 
 ```bash
-pip install -U "pdf2zh>=1.5.3"
+pip install pdf2zh
 ```
 
 ## Usage

README_zh-CN.md

@@ -27,10 +27,10 @@ PDF 文档翻译及双语对照
 
 ## 安装
 
-要求 Python 版本 >=3.8, <=3.11
+要求 Python 版本 <=3.12
 
 ```bash
-pip install -U "pdf2zh>=1.5.3"
+pip install pdf2zh
 ```
 
 ## 使用