Fix the Website URL for Microsoft Learn MCP server

**Describe the bug**
On the <https://registry.modelcontextprotocol.io/> page, the **Website** URL of the Microsoft Learn MCP server duplicates the **Repository** URL.

The **Website** URL should be corrected to <https://learn.microsoft.com/training/support/mcp>

<img width="415" height="450" alt="Image" src="https://github.com/user-attachments/assets/6432538e-a865-4db3-a63e-35b92ca2f1ce" />


