fix link

Author: paigecalvert

docs/vendor/custom-domains-using.md

@@ -15,7 +15,7 @@ To add and verify a custom domain:
 1. In the **Add custom domain** dropdown, select the target Replicated endpoint.
 
     :::note
-    There is a known issue when using a custom domain for the Enterprise Portal if any of your customers use link transformers such as Microsoft Defender Safe Links. For more information, see [Known Issue](custom-domains-using#known-issue) in _About Custom Domains_.
+    There is a known issue when using a custom domain for the Enterprise Portal if any of your customers use link transformers such as Microsoft Defender Safe Links. For more information, see [Known Issue](custom-domains#known-issue) in _About Custom Domains_.
     :::
 
     The **Configure a custom domain** wizard opens.

docs/vendor/enterprise-portal-about.mdx

@@ -39,7 +39,7 @@ For information about using the Enterprise Portal, see [Access and Use the Enter
 
 * Air gap instance records do not appear in the Enterprise Portal until the end customer creates an air gap instance record by either uploading a support bundle for that instance or manually entering instance information. For more information, see [View Active and Inactive Instances](/vendor/enterprise-portal-use#view-active-and-inactive-instances) in _Access and Use the Enterprise Portal_.
 
-* There is a known issue when using a custom domain for the Enterprise Portal if any of your customers use link transformers such as Microsoft Defender Safe Links. For more information, see [Known Issue](custom-domains-using#known-issue) in _About Custom Domains_. 
+* There is a known issue when using a custom domain for the Enterprise Portal if any of your customers use link transformers such as Microsoft Defender Safe Links. For more information, see [Known Issue](custom-domains#known-issue) in _About Custom Domains_. 
 
 ## Comparison to the Download Portal