fix(core): fix error boundary import disrupting CSS order

[Josh-Cena]

Motivation

Quick fix in place of #5987. This is much less risky than reordering all CSS.

Have you read the Contributing Guidelines on pull requests?

Yes

Test Plan

The CSS errors are still gone

[netlify]

✔️ [V2]

🔨 Explore the source changes: 889ad7f

🔍 Inspect the deploy log: https://app.netlify.com/sites/docusaurus-2/deploys/61b002bccc31cc0008ebfba1

😎 Browse the preview: https://deploy-preview-6052--docusaurus-2.netlify.app

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🟠 Performance	75
🟢 Accessibility	98
🟢 Best practices	100
🟢 SEO	100
🟢 PWA	95

Lighthouse ran on https://deploy-preview-6052--docusaurus-2.netlify.app/

[github-actions]

Size Change: -534 B (0%)

Total Size: 655 kB

Filename	Size	Change
website/build/assets/css/styles.********.css	101 kB	-88 B (0%)
website/build/assets/js/main.********.js	485 kB	-446 B (0%)

ℹ️ View Unchanged

Filename	Size
website/.docusaurus/globalData.json	40.1 kB
website/build/index.html	29.5 kB

_{compressed-size-action}

[slorber]

Thanks 👍 wanted to do this :D Also fixed the blog tags CSS issue