fix: correct link formatting in MCP documentation

Author: pixelmaxQm

docs/guide/server/mcp.md

@@ -4,7 +4,7 @@
 
 ## 授权用户内部培训文档【公开】
 
-[MCP内部培训文档]([https://www.bilibili.com/video/BV1cNJgzbEHT](https://flipped-aurora.feishu.cn/docx/DWvvdLVfvoZajJxwDR1cDThhnAh?from=from_copylink))
+[MCP内部培训文档](https://flipped-aurora.feishu.cn/docx/DWvvdLVfvoZajJxwDR1cDThhnAh?from=from_copylink)
 
 ## 视频教程