Update to right var

[sima-zhu]

Description

Please add an informative description that covers that changes made by the pull request and link all relevant issues.
The client package does not use the right variable.
https://github.com/Azure/azure-docs-sdk-java/blob/daily/2022-03-14-ci-succeeded/docs-ref-mapping/reference-latest.yml

Testing pipeline: https://dev.azure.com/azure-sdk/internal/_build/results?buildId=1435994&view=results
If an SDK is being regenerated based on a new swagger spec, a link to the pull request containing these swagger spec changes has been included above.

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• The pull request does not introduce [breaking changes]
• CHANGELOG is updated for new features, bug fixes or other significant changes.
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Testing Guidelines

• Pull request includes test coverage for the included changes.

[danieljurek]

LGTM. Please include links to pipeline running and expected outputs in the docs repo.

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[sima-zhu]

/check-enforcer override