[ReleasePR mixedreality] [Hub Generated] Public private branch 'raonon-MixedReality-UpdateResourceResponse' (#1861)

Create to sync Azure/azure-rest-api-specs#15763
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/main...AzureSDKAutomation:sdkAuto/mixedreality?expand=1)

Author: msftbot[bot]

schemas/2021-03-01-preview/Microsoft.MixedReality.json

@@ -23,6 +23,17 @@
             }
           ]
         },
+        "kind": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/Sku"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "The resource model definition representing SKU"
+        },
         "location": {
           "type": "string",
           "description": "The geo-location where the resource lives"
@@ -41,6 +52,17 @@
           ],
           "description": "Name of an Mixed Reality Account."
         },
+        "plan": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/Identity"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Identity for the resource."
+        },
         "properties": {
           "oneOf": [
             {
@@ -52,6 +74,17 @@
           ],
           "description": "Common Properties shared by Mixed Reality Accounts"
         },
+        "sku": {
+          "oneOf": [
+            {
+              "$ref": "#/definitions/Sku"
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "The resource model definition representing SKU"
+        },
         "tags": {
           "oneOf": [
             {