Fix the table header

[Ajay-singh1]

Description

I fixed the table header and made sure it sticks to the top when the user scrolls down to the bottom of the table.

This PR fixes #6122

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

[l5io]

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[vishalvivekm]

@Ajay-singh1
Thank you for your contribution!
Let's discuss this during the website call on Monday at 6:30 PM IST

adding it as an agenda item to the meeting minutes.

[l5io]

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