Fix style linting error

Author: jakezatecky

examples/src/scss/_cayman.scss

@@ -118,7 +118,13 @@ a {
 }
 
 .page-header {
-  padding: 3rem 4rem;
+  @include large {
+    padding: 3rem 4rem;
+  }
+
+  @include medium {
+    padding: 3rem 4rem;
+  }
 
   @include small {
     padding: 2rem 1rem;