Reduce width of Similar Content sidebar in video modal

Reduced the width of the "Similar Content" sidebar by approximately 10% to provide more space for the video player.

- Updated `css/tokens.css` to reduce `--video-modal-secondary-max` from 44rem to 40rem.
- Updated `css/tailwind.source.css` to reduce the viewport width percentage clamp values:
  - LG breakpoint: 40vw -> 36vw
  - XL breakpoint: 36vw -> 32vw
- Regenerated `css/tailwind.generated.css`.

css/tailwind.source.css

@@ -1897,7 +1897,7 @@
     .video-modal__layout {
       --video-modal-secondary-size: clamp(
         var(--video-modal-secondary-min),
-        40vw,
+        36vw,
         var(--video-modal-secondary-max)
       );
       grid-template-columns:
@@ -1936,7 +1936,7 @@
     .video-modal__layout {
       --video-modal-secondary-size: clamp(
         var(--video-modal-secondary-min),
-        36vw,
+        32vw,
         var(--video-modal-secondary-max)
       );
     }