Update Twitter link to X in the Demo App section

[SarthakPaandey]

Description

This PR updates the Twitter link to X in the Demo App section to reflect the rebranding from Twitter to X. This change ensures that users are directed to the correct platform link.

Fixes # (issue)

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Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

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Screenshots & recording

Since this is a minor update to a link, no screenshots or recordings are necessary.

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Manual review steps

1. Verify that the updated X link in the Demo App section is functioning correctly.
2. Ensure the link is accessible and points to the appropriate X page.

Manual reviewer: Please leave a comment with output from the test if that's the case.

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[adrianthedev]

Thanks @SarthakPaandey, but we're ok with twitter.com
We want to remember it as it was 😅