improvement(search): use font-medium for matched-text emphasis in cmd+k

Drop the colored background highlight in favor of the design system's standard
emphasis weight (font-medium, used by Button/Label/Input/Table). Lighter than
the previous semibold and avoids a background, keeping the palette's clean,
undecorated text style.

Author: waleedlatif1

apps/sim/app/workspace/[workspaceId]/w/components/sidebar/components/search-modal/components/command-items/command-items.tsx

@@ -42,10 +42,7 @@ export const HighlightedText = memo(
       <>
         {buildSegments(text, positions).map((segment, index) =>
           segment.hit ? (
-            <span
-              key={index}
-              className='bg-[var(--highlight-match-bg)] text-[var(--highlight-match-text)]'
-            >
+            <span key={index} className='font-medium'>
               {segment.text}
             </span>
           ) : (