chore(deps): update dependency @azure/functions to v1.2.3

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@azure/functions	1.0.3 -> 1.2.3

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Release Notes

Azure/azure-functions-nodejs-worker

v1.2.2

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• Add None as a valid value for the sameSite property of HTTP cookies
• [Bugfix] Remove noisy error when using Proxy Functions (Azure/azure-functions-host#​4809)
• [Bugfix] Fix buffer overflow with empty-valued HTTP headers (Azure/azure-functions-host#​5975)

v1.2.0

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• Remove duplicated data passed through gRPC from http object
• Populate context.traceContext on context object for correlation details in App Insights (#​244)
• Unblock Node.js v12 with warning that it is not fully supported
• Bugfix: Ensure current working directory always accurate

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