[ReleasePR synapse] [DataFactory] GitHub bring your own app swagger update for ADF/Synapse ARM only (#1813)

Create to sync Azure/azure-rest-api-specs#14690
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/master...AzureSDKAutomation:sdkAuto/synapse?expand=1)

Author: msftbot[bot]

schemas/2019-06-01-preview/Microsoft.Synapse.json

@@ -2331,6 +2331,20 @@
       ],
       "description": "The properties of the geo backup policy."
     },
+    "GitHubClientSecret": {
+      "type": "object",
+      "properties": {
+        "byoaSecretAkvUrl": {
+          "type": "string",
+          "description": "Bring your own app client secret AKV URL"
+        },
+        "byoaSecretName": {
+          "type": "string",
+          "description": "Bring your own app client secret name in AKV"
+        }
+      },
+      "description": "Client secret information for factory's bring your own app repository configuration"
+    },
     "IntegrationRuntime": {
       "type": "object",
       "oneOf": [
@@ -4241,6 +4255,21 @@
           "type": "string",
           "description": "Account name"
         },
+        "clientId": {
+          "type": "string",
+          "description": "GitHub bring your own app client id"
+        },
+        "clientSecret": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/GitHubClientSecret"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Client secret information for factory's bring your own app repository configuration"
+        },
         "collaborationBranch": {
           "type": "string",
           "description": "Collaboration branch"