chore(preprod): change diff text colors (eme-510) (#103335)

make diff text more scannable, before it was yellow for increase or
decrease which was confusuing
<img width="962" height="591" alt="image"
src="https://github.com/user-attachments/assets/8117752b-9670-4281-a8c0-24dccf9f0242"
/>

### Legal Boilerplate

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gonna need some rights from me in order to utilize my contributions in
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Author: mtopo27

static/app/views/preprod/buildComparison/main/sizeCompareItemDiffTable.tsx

@@ -336,11 +336,10 @@ const ChangeAmountCell = styled(SimpleTable.RowCell)<{changeType: DiffType}>`
   color: ${p => {
     switch (p.changeType) {
       case 'increased':
-      case 'decreased':
-        return p.theme.warningText;
       case 'added':
         return p.theme.dangerText;
       case 'removed':
+      case 'decreased':
         return p.theme.successText;
       default:
         throw new Error(`Invalid change type: ${p.changeType}`);