[ReleasePR databox] Update databox.json (#1934)

Create to sync Azure/azure-rest-api-specs#16144
[ReCreate this PR](https://github.com/azure-resource-manager-schemas/compare/main...AzureSDKAutomation:sdkAuto/databox?expand=1)

Author: msftbot[bot]

schemas/2021-08-01-preview/Microsoft.DataBox.json

@@ -453,6 +453,21 @@
             }
           ],
           "description": "Account details of the data to be transferred"
+        },
+        "logCollectionLevel": {
+          "oneOf": [
+            {
+              "type": "string",
+              "enum": [
+                "Error",
+                "Verbose"
+              ]
+            },
+            {
+              "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
+            }
+          ],
+          "description": "Level of the logs to be collected."
         }
       },
       "required": [