Update MCP server link in quickstart guide

Replaces the MCP server link from modelcontextprotocol.io to the official GitHub repository for datum-mcp. #673

Co-Authored-By: Jacob Smith <[email protected]>

Author: felixwidjaja

src/content/docs/docs/quickstart/datum-mcp.mdx

@@ -5,7 +5,7 @@ sidebar:
   order: 5
 ---
 
-Datum’s [official MCP server](https://modelcontextprotocol.io/) helps builders connect AI tools to their Datum projects with a rapidly evolving open standard. Datum MCP gives AI tools secure access to your Datum resources so you can understand their current state, suggest and implement changes, and diagnose common configuration issues.
+Datum’s official [MCP server](https://github.com/datum-cloud/datum-mcp) helps builders connect AI tools to their Datum projects with a rapidly evolving open standard. Datum MCP gives AI tools secure access to your Datum resources so you can understand their current state, suggest and implement changes, and diagnose common configuration issues.
 
 Datum MCP integrates with popular AI assistants like Cursor, enabling you to view and manage:
 - Organizations