docs: fix invalid browserslist query example

[chenjiahan]

Summary

Fix an invalid browserslist query example, Internet Explorer 11 should be IE 11.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

✅ Deploy Preview for rsbuild ready!

Name	Link
🔨 Latest commit	8c7283a
🔍 Latest deploy log	https://app.netlify.com/projects/rsbuild/deploys/68380b709ca83f00083511c8
😎 Deploy Preview	https://deploy-preview-5333--rsbuild.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 80 (🟢 up 4 from production) Accessibility: 97 (no change from production) Best Practices: 92 (no change from production) SEO: 100 (no change from production) PWA: 60 (no change from production) View the detailed breakdown and full score reports

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[Copilot]

Pull Request Overview

This PR corrects an invalid Browserslist query example by replacing the full browser name with its proper shorthand.

• Updated the example in the documentation to use IE 11 instead of Internet Explorer 11.