fix(video-player): update caption styles (carbon-design-system#5184)

### Related Ticket(s)

carbon-design-system#5127 

### Description

Updates caption spacing for video player caption

### Changelog


**Changed**

- video player caption top spacing reduced to `8px`

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packages/styles/scss/components/video-player/_video-player.scss

@@ -58,7 +58,7 @@ $aspect-ratios: ((16, 9), (9, 16), (2, 1), (1, 2), (4, 3), (3, 4), (1, 1));
   .#{$prefix}--video-player__video-caption {
     @include carbon--type-style('caption-01');
 
-    padding-top: var(--#{$dds-prefix}--video-caption--padding, $spacing-05);
+    padding-top: var(--#{$dds-prefix}--video-caption--padding, $spacing-03);
     color: var(--#{$dds-prefix}--video-caption--color, $text-05);
     max-width: 90%;
   }