Fix How to pay permalink

Author: emmagifford

docs/pages/pricing-and-commercial/how-to-pay.md

@@ -6,7 +6,7 @@ layout: page
 title: How to pay
 parent: Pricing and commercial
 nav_order: 4
-permalink: /pricing/how-to-pay
+permalink: /pricing-and-commercial/how-to-pay
 ---
 
 This page describes how NHS England organisations and services pay for the messages they send using NHS Notify.