[ReleasePR Az.BillingBenefitsRp] update typescript.readme.md in billingbenefits#20103

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azure-sdk wants to merge 1 commit intoAzure:mainfrom azure-sdk:sdkAuto/Az.BillingBenefitsRp

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Commits on Nov 14, 2022

CodeGen from PR 21340 in Azure/azure-rest-api-specs
SDKAuto
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