fix: correct link text in README (typo)

[Jah-yee]

Good day,

I noticed a small inconsistency in README.md line 8:

• Current: markitdown-mcp
• Should be: markitdown_mcp

The link URL correctly points to packages/markitdown-mcp (directory name), but the display text should use underscores markitdown_mcp to match the Python package naming convention.

Here's the simple fix:

- See [markitdown-mcp](...) 
+ See [markitdown_mcp](...)

Thank you for your work on this project. I hope this small fix is helpful. Please let me know if there's anything to adjust.

Warmly, RoomWithOutRoof

[Jah-yee]

Good day,

I've submitted a PR that addresses this issue: #1760

The fix changes the display text from 'markitdown-mcp' to 'markitdown_mcp' to match the Python package naming convention.

Thank you for your work on this project.

Warmly, RoomWithOutRoof