[Snyk] Security upgrade @docusaurus/preset-classic from 2.4.3 to 3.5.0

[mikicho]

Snyk has created this PR to fix 2 vulnerabilities in the npm dependencies of this project.

Snyk changed the following file(s):

• package.json
• package-lock.json

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score
	Always-Incorrect Control Flow Implementation SNYK-JS-HTTPPROXYMIDDLEWARE-9691387	601
	Improper Check for Unusual or Exceptional Conditions SNYK-JS-HTTPPROXYMIDDLEWARE-9691389	601

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