fix: upgrade @docusaurus/preset-classic from 2.0.0-beta.6 to 2.4.1

Snyk has created this PR to upgrade @docusaurus/preset-classic from 2.0.0-beta.6 to 2.4.1.

See this package in npm:
https://www.npmjs.com/package/@docusaurus/preset-classic

See this project in Snyk:
https://app.snyk.io/org/stijnmoreels/project/be031a79-a602-4d7b-b645-22ce0f29c597?utm_source=github&utm_medium=referral&page=upgrade-pr