docs(README-zh_CN): Update Composer installation instructions

- Added command to install guanguans/dcat-login-captcha
- Included instructions to resolve installation issues
- Updated command to remove guanguans/dcat-login-captcha

README-zh_CN.md

@@ -22,6 +22,15 @@
 ### Composer 安装
 
 ```bash
+composer require guanguans/dcat-login-captcha -v
+```
+
+### 安装问题([https://github.com/guanguans/dcat-login-captcha/issues/39](https://github.com/guanguans/dcat-login-captcha/issues/39))
+
+```shell
+composer config -g repo.packagist composer https://packagist.org -v
+composer clear-cache -v
+composer remove guanguans/dcat-login-captcha -v
 composer require guanguans/dcat-login-captcha --prefer-source -v
 ```