fix link reference - line 157

Author: duongau

articles/cdn/cdn-map-content-to-custom-domain.md

@@ -154,10 +154,10 @@ To create a CNAME record for your custom domain:
 
 4. If you're previously created a temporary cdnverify subdomain CNAME record, delete it. 
 
-5. If you're using this custom domain in production for the first time, follow the steps for [Add the custom domain with your CDN endpoint](#associate-the-custom-domain-with-your-cdn-endpoint) and [Verify the custom domain](#verify-the-custom-domain).
+5. If you're using this custom domain in production for the first time, follow the steps for [Add the custom domain with your CDN endpoint](#add-a-custom-domain-to-your-cdn-endpoint) and [Verify the custom domain](#verify-the-custom-domain).
 
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-## Add a custom domain tp your CDN endpoint
+## Add a custom domain to your CDN endpoint
 
 After you've registered your custom domain, you can then add it to your CDN endpoint.