update examples/PatchAppServicePlan.json for new PATCH model name.

Author: jackofallops

specification/web/resource-manager/Microsoft.Web/stable/2022-09-01/examples/PatchAppServicePlan.json

@@ -4,7 +4,7 @@
     "resourceGroupName": "testrg123",
     "name": "testsf6141",
     "api-version": "2022-09-01",
-    "appServicePlan": {
+    "appServicePlanPatch": {
       "kind": "app",
       "properties": {}
     }