docs: update version number in README files

- Correct version number from 1.3.2 to 1.3.1 in both README.md and README_zh-CN.md
- Update changelog entries for the latest release

README.md

@@ -48,7 +48,7 @@ Easier to use: Just grab MinerU Desktop. No coding, no login, just a simple inte
 </div>
 
 # Changelog
-- 2025/04/08 1.3.2 released, fixed some compatibility issues
+- 2025/04/08 1.3.1 released, fixed some compatibility issues
   - Supported Python 3.13
   - Resolved errors caused by `transformers 4.51.0`
   - Made the final adaptation for some outdated Linux systems (e.g., CentOS 7), and no further support will be guaranteed for subsequent versions. [Installation Instructions](https://github.com/opendatalab/MinerU/issues/1004)

README_zh-CN.md

@@ -47,7 +47,7 @@
 </div>
 
 # 更新记录
-- 2025/04/08 1.3.2 发布，修复了一些兼容问题
+- 2025/04/08 1.3.1 发布，修复了一些兼容问题
   - 支持python 3.13
   - 解决因`transformers 4.51.0` 导致的报错
   - 为部分过时的linux系统（如centos7）做出最后适配，并不再保证后续版本的继续支持，[安装说明](https://github.com/opendatalab/MinerU/issues/1004)