[fixes] render extracted jinja title for custom doctypes

frappe/website/render.py

@@ -168,6 +168,9 @@ def build_page(path):
 		frappe.local.path = path
 
 	context = get_context(path)
+	if "{{" in context.title:
+		title_template = context.pop('title')
+		context.title = frappe.render_template(title_template, context)
 
 	if context.source:
 		html = frappe.render_template(context.source, context)