[Storage] Update description for PublicNetworkAccess. (#15963)

Author: blueww

src/Storage/Storage.Management/StorageAccount/NewAzureStorageAccount.cs

@@ -491,7 +491,7 @@ public bool AllowCrossTenantReplication
         [ValidateNotNullOrEmpty]
         public string EdgeZone { get; set; }
 
-        [Parameter(Mandatory = false, HelpMessage = "Allow or disallow public network access to Storage Account. Enabled by default. Possible values include: 'Enabled', 'Disabled'.")]
+        [Parameter(Mandatory = false, HelpMessage = "Allow or disallow public network access to Storage Account. Possible values include: 'Enabled', 'Disabled'.")]
         [PSArgumentCompleter("Enabled", "Disabled")]
         [ValidateNotNullOrEmpty]
         public string PublicNetworkAccess { get; set; }

src/Storage/Storage.Management/StorageAccount/SetAzureStorageAccount.cs

@@ -451,7 +451,7 @@ public bool AllowCrossTenantReplication
             IgnoreCase = true)]
         public string DefaultSharePermission { get; set; }
 
-        [Parameter(Mandatory = false, HelpMessage = "Enable or disable public network access to the storage account. Enabled by default. Possible values include: 'Enabled', 'Disabled'.")]
+        [Parameter(Mandatory = false, HelpMessage = "Allow or disallow public network access to Storage Account.Possible values include: 'Enabled', 'Disabled'.")]
         [PSArgumentCompleter("Enabled", "Disabled")]
         [ValidateNotNullOrEmpty]
         public string PublicNetworkAccess { get; set; }

src/Storage/Storage.Management/help/New-AzStorageAccount.md

@@ -819,7 +819,7 @@ Accept wildcard characters: False
 ```
 
 ### -PublicNetworkAccess
-Allow or disallow public network access to Storage Account. Enabled by default. Possible values include: 'Enabled', 'Disabled'.
+Allow or disallow public network access to Storage Account.Possible values include: 'Enabled', 'Disabled'.
 
 ```yaml
 Type: System.String

src/Storage/Storage.Management/help/Set-AzStorageAccount.md

@@ -792,7 +792,7 @@ Accept wildcard characters: False
 ```
 
 ### -PublicNetworkAccess
-Enable or disable public network access to the storage account. Enabled by default. Possible values include: 'Enabled', 'Disabled'.
+Allow or disallow public network access to Storage Account.Possible values include: 'Enabled', 'Disabled'.
 
 ```yaml
 Type: System.String