docs: add release note v1.6.7

website/blog/2023-03-14-v1.6.7.md

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+---
+title: Release Note v1.6.7
+authors: moonrailgun
+image: /img/logo.svg
+slug: release-1.6.7
+keywords:
+  - tailchat
+tags: [Release Note]
+---
+
+- Enhanced personal brand customization, allowing to customize the name and background image of the server login entry (pictures have no file upload limit)
+- Optimized the memory usage of the background management platform, and the memory usage is only about 1/4 of the original
+- The background management platform adds converseID filtering
+- Fixed some bugs

website/i18n/zh-Hans/docusaurus-plugin-content-blog/2023-03-14-v1.6.7.md

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+---
+title: 版本发布日志 v1.6.7
+authors: moonrailgun
+image: /img/logo.svg
+slug: release-1.6.7
+keywords:
+  - tailchat
+tags: [版本发布]
+---
+
+- 增强个人品牌定制，允许自定义服务器登录入口的名称与背景图(图片没有文件上传限制)
+- 优化了后台管理平台的内存占用，占用内存只占原来的1/4左右
+- 后台管理平台增加了converseID的过滤
+- 修复了一些bug