Update RestorePointCollections_Update_MaximumSet_Gen.json (Azure#20769)

removing admin password

Author: Sandido

specification/compute/resource-manager/Microsoft.Compute/ComputeRP/stable/2022-03-01/examples/restorePointExamples/RestorePointCollections_Update_MaximumSet_Gen.json

@@ -96,7 +96,6 @@
                   "osProfile": {
                     "computerName": "computerName",
                     "adminUsername": "admin",
-                    "adminPassword": "aaaaaaaaaaaaaaaaaaaaaaaaaaa",
                     "customData": "aaaaaaaaaaaaaaaaaaaaaaaaaaa",
                     "windowsConfiguration": {
                       "provisionVMAgent": true,