[Snyk] Upgrade @metalsmith/markdown from 1.6.0 to 1.10.0#5

kingjay66 wants to merge 1 commit intomainkingjay66/nodejs.org:mainfrom

snyk-upgrade-a7e06a6bf95d3289c6d242dfbb162bbdkingjay66/nodejs.org:snyk-upgrade-a7e06a6bf95d3289c6d242dfbb162bbdCopy head branch name to clipboard