Added xref

Author: clairekinde11

src/content/docs/billing/billing-user-experience/add-billing-to-url-sdk.mdx

@@ -6,6 +6,7 @@ sidebar:
 relatedArticles:
   - bd6757e3-81d5-48d6-89c8-dd4c222ac647
   - 100f75f1-a0a4-459f-874f-da127f2d0615
+  - c47fa1fb-15e1-4dcf-93d9-59df6acdf6da
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 This topic explains how to customize billing flows with Kinde, including URL parameters, direct auth URLs, and SDK usage in React.