Chore - Updated twitter.svg

[tanmayc43]

Updated the old Twitter bird logo to the new "X" logo.

Because

The old twitter bird logo has been long replaced by the new "X" logo and I have done the same on the website to keep it updated and improve the overall user experience.

This PR

-The old bird logo SVG file was replaced by the new "X" logo SVG file.
-The fill rules were modified accordingly.

Pull Request Requirements

• I have thoroughly read and understand The Odin Project Contributing Guide
• The title of this PR follows the keyword: brief description of change format, using one of the following keywords:
  • Feature - adds new or amends existing user-facing behavior
  • Chore - changes that have no user-facing value, refactors, dependency bumps, etc
  • Fix - bug fixes
• The Because section summarizes the reason for this PR
• The This PR section has a bullet point list describing the changes in this PR
• I have verified all tests and linters pass after making these changes.
• If this PR addresses an open issue, it is linked in the Issue section
• If applicable, this PR includes new or updated automated tests

[KevinMulhern]

Thanks for contributing @tanmayc43!

The new icon is bigger than our other social icons:

We'll need this to look uniform before we can merge!

[tanmayc43]

Thank you for your response !

I have edited the .svg file accordingly and scaled down the logo for uniformity.

[KevinMulhern]

Thanks @tanmayc43, much appreciated!