Change Twitter Logo to X logo on front page

[mathaszip]

Overview

Enhancement: Implemented updated logo for X to ensure compliance with standardized formatting and cohesive visual identity, resolving a noted discrepancy on the website.

Minimal code changes: updated one line in social-channels.js and added the image x-black.png.

Requesting review and feedback, ensuring alignment with expectations.

Checklist

• [x] New and updated code has appropriate documentation
• [x] New and updated code has new and/or updated testing
• [x] Required CI checks are passing
• [x] Visual proof for any user facing features like CLI or documentation updates
• [x] Linked issues closed with keywords

[liamsi]

Please rebase your commits on the current main. You can also open a new PR from a fresh branch and cherry-pick the commits from the old one if that is easier.

[mathaszip]

Did I do it correctly?

[mathaszip]

Please rebase your commits on the current main. You can also open a new PR from a fresh branch and cherry-pick the commits from the old one if that is easier.

I should have done it correctly now. I created a new PR to the dev branch: https://github.com/celestiaorg/celestia.org/pull/356