Update cache-private-link.md

The flag isn't available in Enterprise and Enterprise Flash tier and hence adding this to the documentation.

It is added on the other page wherein we discuss regarding network isolation option available for REDIS cache however it will be good to have it here as well

https://learn.microsoft.com/en-us/azure/azure-cache-for-redis/cache-network-isolation

Author: Amrinder-Singh29

articles/azure-cache-for-redis/cache-private-link.md

@@ -20,7 +20,7 @@ You can restrict public access to the private endpoint of your cache by disablin
 
 >[!Important]
 > There is a `publicNetworkAccess` flag which is `Disabled` by default.
-> You can set the value to `Disabled` or `Enabled`. When set to enabled, this flag allows both public and private endpoint access to the cache. When set to `Disabled`, it allows only private endpoint access. For more information on how to change the value, see the [FAQ](#how-can-i-change-my-private-endpoint-to-be-disabled-or-enabled-from-public-network-access).
+> You can set the value to `Disabled` or `Enabled`. When set to enabled, this flag allows both public and private endpoint access to the cache. When set to `Disabled`, it allows only private endpoint access. Enterprise/Enterprise Flash tier does not support `publicNetworkAccess` flag. For more information on how to change the value, see the [FAQ](#how-can-i-change-my-private-endpoint-to-be-disabled-or-enabled-from-public-network-access).
 
 >[!Important]
 > Private endpoint is supported on cache tiers Basic, Standard, Premium, and Enterprise. We recommend using private endpoint instead of VNets. Private endpoints are easy to set up or remove, are supported on all tiers, and can connect your cache to multiple different VNets at once.