Returns `true` if link contains description ```rust use orgize::{Org, ast::Link}; let link = Org::parse("[[https://google.com]]").first_node:: ().unwrap(); assert!(!link.has_description()); let link = Org::parse("[[https://google.com][Google]]").first_node:: ().unwrap(); assert!(link.has_description()); let link = Org::parse("[[https://example.com][*abc* /abc/]]").first_node:: ().
(&self)