fixed link on wallet demo

Author: ianhalpern

google-apple-pay-demo.html

@@ -120,7 +120,7 @@ <h4 class="text-center my-0">Google & Apple Pay Demo</h4>
 				<div class="container">
 					<div class="row pt-3">
 						<div class="col px-1 text-muted">
-							<p>See the <a href="https://github.com/payload-code/payload-code.github.io/blob/master/bootstrap4-simple-checkout.html">source code</a> for this demo on GitHub.</p>
+							<p>See the <a href="https://github.com/payload-code/payload-code.github.io/blob/master/google-apple-pay-demo.html">source code</a> for this demo on GitHub.</p>
 							<p>For more information on integrating Payload, see the full <a href="https://docs.payload.co">API Documentation</a>.</p>
 						</div>
 					</div>