docs(v2): Fix invalid json

[matthewoestreich]

Motivation

It ain't much, but it's honest work.

Have you read the Contributing Guidelines on pull requests?

Have you read JSON For Beginners? 🙃 sarcasm

Test Plan

Where I come from we test in prod.

Related PRs

I'm the first person to ever discover such a bug. So, no.

[netlify]

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[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟠 Performance	71
🟢 Accessibility	99
🟢 Best practices	100
🟢 SEO	100
🟢 PWA	95

Lighthouse ran on https://deploy-preview-3952--docusaurus-2.netlify.app/classic/

[github-actions]

Size Change: +9 B (0%)

Total Size: 155 kB

ℹ️ View Unchanged

Filename	Size	Change
website/build/blog/2017/12/14/introducing-docusaurus/index.html	20.7 kB	-2 B (0%)
website/build/docs/introduction/index.html	180 B	0 B
website/build/index.html	5.81 kB	0 B
website/build/main.********.js	111 kB	+11 B (0%)
website/build/styles.********.css	17.6 kB	0 B

_{compressed-size-action}

[lex111]

@oze4 this is actually JS, not JSON, but thanks for the fix!