[docs][material-ui][Card] Update CardMedia description (@shahzaibdev1) (

mui#43121)

Signed-off-by: shahzaibdev1 <65166554+shahzaibdev1@users.noreply.github.com>
Co-authored-by: shahzaibdev1 <65166554+shahzaibdev1@users.noreply.github.com>
Co-authored-by: Aarón García Hervás <aaron.garcia.hervas@gmail.com>
Co-authored-by: ZeeshanTamboli <zeeshan.tamboli@gmail.com>

docs/data/material/components/cards/cards.md

@@ -20,7 +20,7 @@ The Material UI Card component includes several complementary utility component
 - Card: a surface-level container for grouping related components.
 - Card Content: the wrapper for the Card content.
 - Card Header: an optional wrapper for the Card header.
-- Card Media: an optional container for displaying background images and gradient layers behind the Card Content.
+- Card Media: an optional container for displaying images, videos, etc.
 - Card Actions: an optional wrapper that groups a set of buttons.
 - Card Action Area: an optional wrapper that allows users to interact with the specified area of the Card.