remark theme change

_includes/comments/remark42.html

@@ -21,11 +21,15 @@
         }
     })(remark_config.components || ['embed']);
 
-    window.onload = function () {
+
+</script>
+
+<div id="remark42"></div>
+
+<script>
+        window.onload = function () {
         if (window.matchMedia && window.matchMedia('(prefers-color-scheme: dark)').matches) {
             window.REMARK42.changeTheme('dark');
         }
     }
-</script>
-
-<div id="remark42"></div>
+</script>