End of support Azure Functions 3.x

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Describe the error
Beginning on December 13, 2022, function apps running on versions 2.x and 3.x of the Azure Functions runtime have reached the end of life (EOL) of extended support.

After the deadline, function apps can be created and deployed from your CI/CD DevOps pipeline, and all existing apps continue to run without breaking changes. However, your apps are not eligible for new features, security patches, and performance optimizations. You'll get related service support once you upgraded them to version 4.x.

End of support for these runtime versions is due to the ending of support for .NET Core 3.1, which is required by these older runtime versions. This requirement affects all languages supported by Azure Functions.

Source: https://learn.microsoft.com/en-us/azure/azure-functions/migrate-version-3-version-4?tabs=net6-in-proc%2Cazure-cli%2Cwindows&pivots=programming-language-csharp

Proposed solution: Please migrate