API Management - EMailTemplate: Wrong enumeration values

The enumeration values for the API Managements E-Mailtemplates are not working. They have the wrong casing.

Current values ( see https://docs.microsoft.com/en-us/rest/api/apimanagement/2019-12-01/emailtemplate/get#templatename ):

Name | Type | Description
-- | -- | --
accountClosedDeveloper | string |  
applicationApprovedNotificationMessage | string

A rest call with these values does not work:

`https://management.azure.com/subscriptions//resourceGroups//providers/Microsoft.ApiManagement/service//templates/accountClosedDeveloper?api-version=2020-06-01-preview `

The name must be **A**ccountClosedDeveloper with an upper first character.

The enumeration values should be fixed to reflect that and only container values with an upper cased first character.

Place where the changes should happen: https://github.com/Azure/azure-rest-api-specs/blob/master/specification/apimanagement/resource-manager/Microsoft.ApiManagement/stable/2020-12-01/apimanagement.json#L708

Open specification/apimanagement/resource-manager/Microsoft.ApiManagement/stable/2020-12-01/apimanagement.json around line 708 and compare the E-MailTemplate enum values with the linked API documentation. Confirm the required initial capitalization and verify that the enum contains only the corrected values.

Written by the indexing model from the issue text.