[ReleasePR botservice] [Hub Generated] Review request for Microsoft.BotService to add version preview/2021-05-01-preview (#2055)

Create to sync Azure/azure-rest-api-specs#16760
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/main...AzureSDKAutomation:sdkAuto/botservice?expand=1)

Author: msftbot[bot]

schemas/2021-03-01/Microsoft.BotService.json

@@ -476,17 +476,6 @@
           ],
           "description": "Whether the bot is developerAppInsightsApiKey set"
         },
-        "isIsolated": {
-          "oneOf": [
-            {
-              "type": "boolean"
-            },
-            {
-              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
-            }
-          ],
-          "description": "Whether the bot is in an isolated network"
-        },
         "isStreamingSupported": {
           "oneOf": [
             {
@@ -567,6 +556,21 @@
           ],
           "description": "Contains resource parameters defined as key/value pairs."
         },
+        "publicNetworkAccess": {
+          "oneOf": [
+            {
+              "type": "string",
+              "enum": [
+                "Enabled",
+                "Disabled"
+              ]
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Whether the bot is in an isolated network."
+        },
         "publishingCredentials": {
           "type": "string",
           "description": "Publishing credentials of the resource"

schemas/2021-05-01-preview/Microsoft.BotService.json

@@ -518,17 +518,6 @@
           ],
           "description": "Whether the bot is developerAppInsightsApiKey set"
         },
-        "isIsolated": {
-          "oneOf": [
-            {
-              "type": "boolean"
-            },
-            {
-              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
-            }
-          ],
-          "description": "Whether the bot is in an isolated network"
-        },
         "isStreamingSupported": {
           "oneOf": [
             {
@@ -609,6 +598,21 @@
           ],
           "description": "Contains resource parameters defined as key/value pairs."
         },
+        "publicNetworkAccess": {
+          "oneOf": [
+            {
+              "type": "string",
+              "enum": [
+                "Enabled",
+                "Disabled"
+              ]
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Whether the bot is in an isolated network."
+        },
         "publishingCredentials": {
           "type": "string",
           "description": "Publishing credentials of the resource"