Add width height to image of aboutus component

[GiangNT95]

Bug: CMS-47074

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[exacs]

This change assumes that the image is squared (500x500) which may not be true.

The original issue (image stretched across full screen) seems to be a CSS issue because Next.js' <Image fill /> attribute requires container to have position: "relative", "fixed", "absolute".

Read more: https://nextjs.org/docs/pages/api-reference/components/image#fill

[exacs]

This should work.

Worth mentioning that, with this change, images will have always a 16/9 ratio because of width:100%; padding-top: 56.25%