Update enable-cors-developer-portal.md

heading level

Author: dlepow

articles/api-management/enable-cors-developer-portal.md

@@ -57,7 +57,7 @@ You can enable a setting to configure a CORS policy automatically for all APIs i
 >
 > As a workaround, you can pass the subscription key in a query parameter.
 
-### CORS configuration for custom domain name
+## CORS configuration for custom domain name
 
 If you configure a [custom domain](configure-custom-domain.md) for the developer portal and want visitors to use the test console on API reference pages, ensure that you enable CORS for the custom developer portal domain name.
 
@@ -90,4 +90,4 @@ If you [self-host](developer-portal-self-host.md) the developer portal, the foll
 ## Related content
 
 * For more information about configuring a policy, see [Set or edit policies](set-edit-policies.md).
-* For details about the CORS policy, see the [cors](cors-policy.md) policy reference.
+* For details about the CORS policy, see the [cors](cors-policy.md) policy reference.