fix table schedule fix head top

assets/style/schedule.scss

@@ -161,9 +161,9 @@
 
     thead.fix{
         position: fixed;
-        top: 0;
+        top: 42px;
         background-color: rgba(255, 255, 255, 0.96);
-        z-index: 100;
+        z-index: 50;
         box-shadow: 0 2px 3px rgba(0, 0, 0, 0.5);
         border-radius: 0 0 20px 20px;