docs: Updating Responsive Styles Support Section of V8 Guide

[josh-bagwell]

Summary

Fixes: #1788

Adding responsive style support documentation to the v8 upgrade guide.

Release Category

Documentation

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Checklist

• [ ] MDX documentation adheres to Canvas Kit's standard MDX template

For the Reviewer

• [ ] PR title is short and descriptive
• [ ] PR summary describes the change (Fixes/Resolves linked correctly)
• [ ] PR Release Notes describes additional information useful to call out in a release message or removed if not applicable
• [ ] Breaking Changes provides useful information to upgrade to this code or removed if not applicable

Where Should the Reviewer Start?

/modules/docs/mdx/8.0-UPGRADE-GUIDE.mdx

Areas for Feedback? (optional)

• [ ] Documentation

[cypress[bot]]

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Test summary

737 • 0 • 2 • 0 • 0

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Run details

Project	canvas-kit
Status	Passed
Commit	c23294c08e ℹ️
Started	Oct 20, 2022 5:33 PM
Ended	Oct 20, 2022 5:39 PM
Duration	06:36 💡
OS	Linux Ubuntu - 20.04
Browser	Electron 94

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