Add note about Azure Function Linux dotnet isolated applications not supporting vNet integration

[dcrreynolds]

Recently ran into an issue and discovered that an Azure Function running Linux and using dotnet isolation does not work with vNet integration (gRPC exceptions at startup). This missing support should be noted in this (and/or maybe another doc) to save time and better inform design decisions when using these features together.

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Document Details

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• ID: 6ad5f362-cbfb-0621-4389-6378f50359e4
• Version Independent ID: ebf1a8f3-ab9d-d295-e3a4-a982ed9df1e9
• Content: Guide for running C# Azure Functions in an isolated worker process
• Content Source: articles/azure-functions/dotnet-isolated-process-guide.md
• Service: azure-functions
• GitHub Login: @ggailey777
• Microsoft Alias: glenga

[AjayBathini-MSFT]

@dcrreynolds Thanks for your feedback! We will investigate and update as appropriate.