adds page for credit card subscription changes

Author: Paul Savoie

docs/change-credit-card-subscription.html

@@ -0,0 +1,15 @@
+---
+title: Changing credit card subscription
+header: Changing credit card subsription
+layout: thankyou
+sitemap: false
+---
+
+<h2>Changing your credit card subscription</h2>
+
+<p>To change or extend your credit card subscription, please contact our support team.</p>
+<p>&nbsp;</p>
+<p>&nbsp;</p>
+<div>
+	<a href='https://signpath.io/support' class='btn btn-primary'>Contact support</a>
+</div>