fix: update environment condition from preview to production in default.html

shared/layouts/docs/default.html

@@ -5,7 +5,7 @@
 	<meta charset="UTF-8">
 	<meta name="viewport" content="width=device-width, initial-scale=1.0">
 
-	{% if environment == 'preview' %}
+	{% if environment == 'production' %}
 	
 	{% assign pageSection = "" %}
 	{% if page.url contains "/ui/" %}