dead links on [https://sigmahq.io/sigma-specification/sigmahq/sigmahq-rule-convention.html](https://sigmahq.io/sigma-specification/sigmahq/sigmahq-rule-convention.html) ---  refers to: https://sigmahq.io/sigma-specification/sigmahq/sigmahq_filename_convention.md ---  refers to: https://sigmahq.io/specification/sigma_rules.md
