Update DataLakeStorage.json (#13145)

specification/storage/data-plane/Microsoft.StorageDataLake/stable/2020-06-12/DataLakeStorage.json

@@ -644,7 +644,7 @@
       "patch": {
         "operationId": "Path_Update",
         "summary": "Append Data | Flush Data | Set Properties | Set Access Control",
-        "description": "Uploads data to be appended to a file, flushes (writes) previously uploaded data to a file, sets properties for a file or directory, or sets access control for a file or directory. Data can only be appended to a file. This operation supports conditional HTTP requests. For more information, see [Specifying Conditional Headers for Blob Service Operations](https://docs.microsoft.com/en-us/rest/api/storageservices/specifying-conditional-headers-for-blob-service-operations).",
+        "description": "Uploads data to be appended to a file, flushes (writes) previously uploaded data to a file, sets properties for a file or directory, or sets access control for a file or directory. Data can only be appended to a file. Concurrent writes to the same file using multiple clients are not supported. This operation supports conditional HTTP requests. For more information, see [Specifying Conditional Headers for Blob Service Operations](https://docs.microsoft.com/en-us/rest/api/storageservices/specifying-conditional-headers-for-blob-service-operations).",
         "consumes": [
           "application/octet-stream"
         ],