Fix one last link

Author: pedrosousa

src/content/docs/rules/transform/response-header-modification/index.mdx

@@ -63,7 +63,7 @@ You can create a response header transform rule [in the dashboard](/rules/transf
 
 - Currently, there is a limited number of HTTP response headers that you cannot change. Cloudflare may remove restrictions for some of these HTTP response headers when presented with valid use cases. [Create a post in the community](https://community.cloudflare.com) for consideration.
 
-- Any response header modifications will also apply to Cloudflare error pages and [custom error pages](/support/more-dashboard-apps/cloudflare-custom-pages/configuring-custom-pages-error-and-challenge/).
+- Any response header modifications will also apply to Cloudflare error pages and [custom error pages](/rules/custom-errors/).
 
 - Modifying `cache-control`, `CDN-Cache-Control`, or `Cloudflare-CDN-Cache-Control` headers will not change the way Cloudflare caches an object. Instead, you should create a [Cache Rule](/cache/how-to/cache-rules/).