do not bark on yaml headers

added 8 commits

• 5793ea51...aca4c11e - 7 commits from branch master
• 64e79cae - Merge branch 'master' into feature/yaml-header-friendlyness

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added 2 commits

• 74a914c7 - feat(.markdownlint.json): accept YAML header
• 71b57de8 - feat: add YAML header back to file

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enabled an automatic merge when the pipeline for 71b57de8 succeeds

merged

mentioned in commit 953cfa59