Update wording in registry resource docs

Author: Anna Blendermann

docs/resources/registry.md

@@ -4,11 +4,11 @@ page_title: "rancher2_registry Resource"
 
 # rancher2\_registry Resource
 
-Provides a Rancher v2 Registry resource. This can be used to create docker registries for Rancher v2 environments and retrieve their information.
+Provides a Rancher v2 Registry resource. This resource creates Kubernetes secrets with the type `kubernetes.io/dockerconfigjson` for authenticating against Docker registries for Rancher v2 environments and retrieving their information.
 
-Depending of the availability, there are 2 types of Rancher v2 docker registries:
-- Project registry: Available to all namespaces in the `project_id`
-- Namespaced registry: Available to just `namespace_id` in the `project_id`
+Depending on the availability, there are 2 types of Rancher v2 Docker registry resources:
+- Project registry resource: Available to all namespaces in the `project_id`.
+- Namespaced registry resource: Available to `namespace_id` in the `project_id`.
 
 ## Example Usage