docs(readme): Update gif with the new demo site

[DenverCoder1]

Summary

The current demo gif is a bit outdated and is missing some of the new features.

This is a new recording showing the demo site's features.

Type of change

• [ ] Bug fix (added a non-breaking change which fixes an issue)
• [ ] New feature (added a non-breaking change which adds functionality)
• [x] Updated documentation (updated the readme, templates, or other repo files)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested?

• [ ] Ran tests with composer test
• [ ] Added or updated test cases to test new features