Update dependency @primer-io/checkout-web to v2.49.0

Author: renovate[bot]

src/static/checkout.html

@@ -10,10 +10,10 @@
     </style>
     <link
       rel="stylesheet"
-      href="https://sdk.primer.io/web/v2.28.0/Checkout.css"
+      href="https://sdk.primer.io/web/v2.49.0/Checkout.css"
     />
     <script
-      src="https://sdk.primer.io/web/v2.28.0/Primer.min.js"
+      src="https://sdk.primer.io/web/v2.49.0/Primer.min.js"
       crossorigin="anonymous"
     ></script>
     <link rel="stylesheet" href="/static/style.css" />