[BUG] "MCP documentation" link incorrectly points to external site instead of internal navigation

Environment

• Platform (select one):
• [ ] Anthropic API
• [ ] AWS Bedrock
• [ ] Google Vertex AI
• [x] Other: Claude Code documentation website
• Claude CLI version: <!-- output of claude --version -->
• Operating System: <!-- e.g. macOS 14.3, Windows 11, Ubuntu 22.04 -->
• Terminal: <!-- e.g. iTerm2, Terminal App -->

Bug Description

The "MCP documentation" link in the Model Context Protocol (MCP) page incorrectly points to an external website (https://modelcontextprotocol.io/introduction) instead of linking to the MCP section in the navigation menu of the same site.

Steps to Reproduce

1. Navigate to the Claude Code documentation website
2. Go to the "Model Context Protocol (MCP)" page
3. Look for the text "For more details about MCP, see the MCP documentation"
4. Click on the "MCP documentation" link

Expected Behavior

The "MCP documentation" link on this page should navigate to the "Model Context Protocol (MCP)" section in the site's navigation menu, keeping users within the Claude Code documentation. That would be this url: https://docs.anthropic.com/en/docs/mcp.

Actual Behavior

The link redirects users to an external website (https://modelcontextprotocol.io/introduction) instead of staying within the Claude Code documentation site.

Additional Context

This creates a confusing user experience where users are unexpectedly taken to a different website when they expect to navigate within the same documentation site. The link should either point to the correct internal navigation item or be clearly marked as an external link if the redirect is intentional.

Screenshot attached showing the problematic link.

<img width="1065" alt="Image" src="https://github.com/user-attachments/assets/66e7f492-863d-4efb-b848-590a3f8f6aa8" />