chore: Update examples after release of Docusaurus v2.1.0

[slorber]

Motivation

Update examples after release of Docusaurus v2.1.0 #8040

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⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
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/docs/installation	🟠 72	🟢 100	🟢 100	🟢 100	🟢 90	Report

[slorber]

@Josh-Cena FYI the generate example script seems to behave differently now.

Not sure why but it doesn't generate yarn.lock files anymore but generate a package-lock.json file for me locally 🤷‍♂️ (despite using yarn create in the script 😅 )

In practice, it doesn't seem like a big deal, and it was probably not goodto bias toward Yarn in the first place 🤷‍♂️

Sandboxes seem to work fine without the lockfile so I'll merge as is for now

[Josh-Cena]

Interesting. I'll take a look. I never understood what's going on with the generate examples script—it's doing so many things in one...