Don't use spoiler blur for noscript envs

doc/template.html

@@ -98,6 +98,14 @@
         --pausetext-scale: 0.5;
       }
     </style>
+    <noscript>
+      <style>
+        /* for accessibility */
+        .spoilered {
+          filter: none !important;
+        }
+      </style>
+    </noscript>
     <script>
       "use strict";
       const speeds = [0, 0.25, 0.5, 1, 2, 4];