Option For formatting Markdown with checkboxes instead of *

[Arteiii]

Currently, when an issue is created, the broken links are displayed as a markdown list, e.g:

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• [404] https://docs.rs/url/*/url/form_urlencoded/fn.byte_serialize.html | Network error: Page not found
• [404] https://docs.rs/url/*/url/form_urlencoded/fn.parse.html | Network error: Not found

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An additional formatting option for checkboxes would be useful instead:

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• [404] https://docs.rs/url/*/url/form_urlencoded/fn.byte_serialize.html | Network error: Page not found
• [404] https://docs.rs/url/*/url/form_urlencoded/fn.parse.html | Network error: Not found

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especially when using lychee link checking actions and issue creation, as github fully supports it and it would simplify working with larger reports and multiple people.