test new spec-gen-sdk for version 0.4.1 in readme.md only

[JackTn]

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API Change Check

APIView identified API level changes in this PR and created the following API reviews

Language	API Review for Package
Swagger	Microsoft.DataFactory
Go	sdk/resourcemanager/datafactory/armdatafactory
JavaScript	@azure/arm-datafactory
Java	com.azure.resourcemanager:azure-resourcemanager-datafactory