Update feature_request.md

[H-a-rshit]

In the feature_request.md file I have replace the existing line with - 🎨 Wireframes and designs for Meshery UI in Figma (open invite) The existing line was - 🎨 Wireframes and designs for Meshery UI in Figma

Description

This PR fixes # It converts - 🎨 Wireframes and designs for Meshery UI in Figma to 🎨 Wireframes and designs for Meshery UI in Figma (open invite)

Notes for Reviewers

Signed commits

• [X] Yes, I signed my commits.