update h4 color

Author: sweta1308

snippets/components/CodePreview.css

@@ -293,10 +293,6 @@
 
 /* Dark mode adjustments (if Mintlify supports dark mode) */
 @media (prefers-color-scheme: dark) {
-  .content-section h4 {
-    color: #f0f0f0;
-  }
-
   .content-section p {
     color: #c0c0c0;
   }