[Snyk] Security upgrade gatsby from 2.13.73 to 4.0.0#53

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snyk-bot wants to merge 1 commit intomasterfrom snyk-fix-03eb00cf1901104e06981633991faa95

+10,730-6,342

Commits on Jan 25, 2022

fix: deps/npm/docs/package.json & deps/npm/docs/package-lock.json to reduce vulnerabilities
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