Update company logos on the homepage with similar dimensions, padding… (

foxglove#1040)

…, and format

### Public-Facing Changes

Removed padding, aligned the heights, and matched the format of company
logo images.

### Description

To address the lack of consistent spacing for logo assets on MCAP
websites.

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Co-authored-by: Esther Weon <esther.s.weon@gmail.com>