add hover effects and improve styles of Speaker's Panel in Home page

[Prthmsh7]

What does this PR do?

This PR adds hover effects and improve styles of Speaker's Panel in Home page

fixes : #15

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Name	Status	Preview	Comments	Updated (UTC)
tedx-juet	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Oct 23, 2023 9:28am

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[hardiksharma02]

Great work