Fix error in luis runtime readme for golang

[ArcturusZhang]

Latest improvements:

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[openapi-sdkautomation]

In Testing, Please Ignore

[Logs] (Generated from 3df959d, Iteration 1)

Go: test-repo-billy/azure-sdk-for-go [Logs] [Diff]

• cognitiveservices/v2.0/luis [Logs]
• cognitiveservices/v3.0/luis [Logs] [Instructions] [Generation PR] [Integration PR]
  • cognitiveservices.v3.0.luis.zip

Python: test-repo-billy/azure-sdk-for-python [Logs] [Diff]

• azure-cognitiveservices-language-luis [Logs] [Instructions] [Generation PR]
  • azure-cognitiveservices-language-luis-0.3.1.zip
  • azure_cognitiveservices_language_luis-0.3.1-py2.py3-none-any.whl

JavaScript: test-repo-billy/azure-sdk-for-js [Logs] [Diff]

• @azure/cognitiveservices-luis-runtime [Logs]

[AutorestCI]

Automation for azure-sdk-for-go

The initial PR has been merged into your service PR:
Azure/azure-sdk-for-go#6121