[UI] Fix blog card thumbnail alignment in list viewfix: improve blog card thumbnail alignment in list view

[Saanvim11]

Description

This PR fixes inconsistent blog card thumbnail alignment in list view.

Changes

• Replaced object-fit: contain with object-fit: cover
• Updated image sizing to ensure thumbnails fill their containers consistently
• Removed uneven spacing caused by varying image aspect ratios

This addresses the layout inconsistency discussed in #7743.

[github-actions]

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[rishiraj38]

@Saanvim11 The DCO check is failing. Also, we already have a prop specifically handling the list view, so why are we adding object-fit properties again here?

I believe these changes might end up affecting the grid view as well.

[github-actions]

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[rishiraj38]

@Saanvim11 Please make a signed commit using git commit -s -m.

[rishiraj38]

Please apply the changes requested.

[rishiraj38]

@saurabhraghuvanshii @Rajesh-Nagarajan-11 Please take a look. Apart from the DCO, everything else looks good to me.

[Rajesh-Nagarajan-11]

@Saanvim11 Kindly sign off your commits please