wording + link

Author: patriciasantaana

src/content/docs/cloudflare-challenges/troubleshooting/index.mdx

@@ -28,7 +28,7 @@ For example, a visitor to your website who is coming from a given search engine
 
 This affects tools like Google Analytics, which reads the referer from JavaScript, since it replaces the previous site that visitors came from.
 
-You can add tracking scripts, such as the Google Tag Manager Javascript, within the Challenge Pages to capture the correct referer header on the initial request. 
+You can add tracking scripts, such as the Google Tag Manager Javascript, within an existing [custom Managed Challenge Error Page](/rules/custom-errors/) to capture the correct referer header on the initial request. 
 
 ### Cross-origin resource sharing (CORS) preflight requests