[Snyk] Security upgrade markdown-it from 8.4.2 to 12.3.2#1

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-c4d27ce2633accdc082c70a74f209c36

+22-10

Commits on Jan 12, 2022

fix: backend/package.json & backend/package-lock.json to reduce vulnerabilities
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