Update quickstart.mdx

I think the correct log path is  ~/Library/Logs/Claude/mcp.log, unless we are planning to change that. @jspahrsummers knows more.

Author: dsp-ant

quickstart.mdx

@@ -309,7 +309,7 @@ Each client may implement MCP features differently or support different capabili
   <Accordion title="Database connection errors?">
     1. Check Claude Desktop's logs:
        ```bash
-       tail -f ~/Claude.log
+       tail -f ~/Library/Logs/Claude/mcp.log
        ```
     
     2. Verify database access:
@@ -335,4 +335,4 @@ Each client may implement MCP features differently or support different capabili
   <Card title="Explore examples" icon="github" href="https://github.com/modelcontextprotocol/servers">
     Browse our collection of example servers to see what's possible.
   </Card>
-</CardGroup>
+</CardGroup>