CodeGen from PR 19105 in Azure/azure-rest-api-specs

[BotService] Update Slack property (#19105)

* Add blockchain to latest profile

* Add additional types

* update slack property

Co-authored-by: Mark Cowlishaw <markcowl@microsoft.com>

Author: SDKAuto

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

@@ -1838,6 +1838,17 @@
           "type": "string",
           "description": "The Slack landing page Url"
         },
+        "registerBeforeOAuthFlow": {
+          "oneOf": [
+            {
+              "type": "boolean"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Whether to register the settings before OAuth validation is performed. Recommended to True."
+        },
         "scopes": {
           "type": "string",
           "description": "The Slack permission scopes."