[Snyk] Security upgrade mjml from 4.14.1 to 4.15.0#62

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mashpie wants to merge 1 commit intomasterfrom snyk-fix-5dc81e86db220a0f7b26626cb95fb43c

+395-283

Commits on Jan 31, 2024

fix: package.json & yarn.lock to reduce vulnerabilities
snyk-bot
committed