Webapp:Connection string type accepted values do not match actual accepted values

Connection string type.

accepted values: ApiHub, Custom, DocDb, EventHub, MySql, NotificationHub, PostgreSQL, RedisCache, SQLAzure, SQLServer, ServiceBus.

But in the app service configuration connection string types the only accepted values are: MySQL, SQLServer, SQLAzure, PostgreSQL and Custom.

When the type is ServiceBus, IConfiguration.GetConnectionString("Name") could not resolve it in Azure App Service.

Changing the type to Custom allowed IConfiguration.GetConnectionString("Name") to work as usual.

Is this a bug?

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#### Document Details

⚠ *Do not edit this section. It is required for docs.microsoft.com ➟ GitHub issue linking.*

* ID: f2b885be-54f8-23f0-9fff-ec4feb157553
* Version Independent ID: 2ad01dad-e05d-e129-13b6-d1ed09db7086
* Content: [az webapp config connection-string](https://docs.microsoft.com/en-us/cli/azure/webapp/config/connection-string?view=azure-cli-latest)
* Content Source: [latest/docs-ref-autogen/webapp/config/connection-string.yml](https://github.com/MicrosoftDocs/azure-docs-cli/blob/live/latest/docs-ref-autogen/webapp/config/connection-string.yml)
* Service: **app-service-web**
* GitHub Login: @rloutlaw
* Microsoft Alias: **routlaw**

Start with the linked az webapp config connection-string documentation and its content source at latest/docs-ref-autogen/docs/webapp/config/connection-string.yml. Compare the documented accepted values with the App Service configuration behavior described in the issue, especially ServiceBus resolution. Done means the specification and documentation accurately reflect the accepted types and the reported discrepancy is resolved or clearly explained.

Written by the indexing model from the issue text.