Updating primary registry requirements (#7840)

Author: achuribooks

docs/docs-content/clusters/edge/local-ui/cluster-management/create-cluster.md

@@ -100,8 +100,7 @@ management.
 
    :::warning
 
-   If you are using a version of the Palette agent that is earlier than 4.6.21, your locally managed clusters must have
-   a primary registry.
+   A primary registry is required for locally managed multi-node clusters without internet connectivity.
 
    :::
 

docs/docs-content/clusters/edge/site-deployment/deploy-custom-registries/deploy-primary-registry.md

@@ -27,6 +27,12 @@ If you already have a cluster with the deprecated **Harbor Edge-Native Config**
 Harbor registry using **Registry Connect**, refer to
 [Migrate from Harbor Edge-Native Config Pack](./migrate-edge-native-config.md).
 
+:::warning
+
+A primary registry is required for locally managed multi-node clusters without internet connectivity.
+
+:::
+
 ## Limitations
 
 - The Harbor registry is not supported on VerteX. If your Edge cluster is managed by a VerteX instance, you cannot use