Update quickstart-create-data-factory-python.md

while running the code, it throws error saying, type attribute is missing.

Author: CloudBIStack

articles/data-factory/quickstart-create-data-factory-python.md

@@ -196,7 +196,7 @@ You define a dataset that represents the source data in Azure Blob. This Blob da
 ```python
     # Create an Azure blob dataset (input)
     ds_name = 'ds_in'
-    ds_ls = LinkedServiceReference(reference_name=ls_name)
+    ds_ls = LinkedServiceReference(type="LinkedServiceReference",reference_name=ls_name)
     blob_path = '<container>/<folder path>'
     blob_filename = '<file name>'
     ds_azure_blob = DatasetResource(properties=AzureBlobDataset(
@@ -370,7 +370,7 @@ def main():
 
     # Create an Azure blob dataset (input)
     ds_name = 'ds_in'
-    ds_ls = LinkedServiceReference(reference_name=ls_name)
+    ds_ls = LinkedServiceReference(type="LinkedServiceReference",reference_name=ls_name)
     blob_path = '<container>/<folder path>'
     blob_filename = '<file name>'
     ds_azure_blob = DatasetResource(properties=AzureBlobDataset(