Update helm-image-registry.mdx (#3307)

* Update helm-image-registry.mdx

i believe these are actually the correct ways to reference these

* Update helm-image-registry.mdx

---------

Co-authored-by: Paige Calvert <[email protected]>

Author: grantmiller

docs/vendor/helm-image-registry.mdx

@@ -34,9 +34,9 @@ To use the Replicated proxy registry for applications installed with Helm:
       # values.yaml
       api:
         image:
-          # proxy.registry.com or your custom domain
-          registry: ghcr.io
-          repository: proxy/app/ghcr.io/cloudnative-pg/cloudnative-pg
+          # proxy.replicated.com or your custom domain
+          registry: proxy.replicated.com
+          repository: proxy/your-app/ghcr.io/cloudnative-pg/cloudnative-pg
           tag: catalog-1.24.0
       ```
 
@@ -99,4 +99,4 @@ To use the Replicated proxy registry for applications installed with Helm:
 
 1. Package your Helm chart and add it to a release. Promote the release to a development channel. See [Managing Releases with Vendor Portal](releases-creating-releases).
 
-1. Install in a development environment to test your changes. See [Install with Helm](/vendor/install-with-helm).
+1. Install in a development environment to test your changes. See [Install with Helm](/vendor/install-with-helm).