Markdown parsing

When parsing markdown, some times, elements are missing. For example, when parsing: - **Capital social**: 1 000,00 Euros

docling returns only: - Capital social

A simple solution for this case, would be to replace line 253:

snippet_text = str(first_child.children[0].children)  # type: ignore

By this:

snippet_text = marko.md_renderer.MarkdownRenderer().render(first_child).strip()  # type: ignore