Shadows on hover for timeline

[trexdinosaur]

Gives a bit more dimension:
https://imgur.com/a/pSCqT

Thanks

[gupta-utkarsh]

@aka-jain Can you have a look at this. Is the extra shadow required?

[gautamjajoo]

@aka-jain Do we need the extra shadow here??

[aka-jain]

@gautamjajoo the news cards are not links so there is no need to add hover effect on these cards.
cc @uttu357

[gautamjajoo]

@trexdinosaur Hence closing this PR.

[pavanagrawal123]

Please do note that the icons for the external projects and sponsors were links, but this PR didn't select specifically for them, it selected cards in general.