fixing playground responsive bahavior

Summary: The error message saying the playground is only available on bigger screens also was shown on big screens.

Reviewed By: emilsjolander

Differential Revision: D7989482

fbshipit-source-id: f444ca2d6608b868c4ff4d38fa6798d80b57c047

website/src/pages/playground/index.css

@@ -3,12 +3,14 @@
   flex: 1;
 }
 
+@media (max-width: 991px) {
   .playground-page .error-container {
     display: flex;
     flex-direction: column;
     align-items: center;
     justify-content: center;
   }
+}
 
 .playground-page .error-text {
   color: #444950;