def modify_readme(content: str) -> str:
    """Modify README.md."""
    content = content.replace("myst-parser", "myst-docutils")
    content = content.replace(
        "# MyST-Parser",
        "# MyST-Parser\n\nNote: myst-docutils is identical to myst-parser, "
        "but without installation requirements on sphinx",
    )
    content = content.replace("myst-docutils.readthedocs", "myst-parser.readthedocs")
    content = content.replace(
        "readthedocs.org/projects/myst-docutils", "readthedocs.org/projects/myst-parser"
    )
    return content