Fix the issue of missing subcategory attribute for md file

[neil-yechenwei]

Currently the travis ci pipeline is failed due to missing the property subcategory in md file. So this fix is trying to resolve this issue. Thanks.

The failed travis ci:
https://travis-ci.org/terraform-providers/terraform-provider-azurerm/jobs/612147960?utm_medium=notification&utm_source=github_status

[neil-yechenwei]

@katbyte , I just found it seems that the check logic of md file has been changed, which requires the property subcategory in md file so that the travis ci is failed. So I submitted this pr to fix this issue. Thanks.

[tombuildsstuff]

hi @neil-yechenwei

Thanks for this PR.

If we can add a name for the category rather than just having an empty value then this otherwise LGTM.

Thanks!

[neil-yechenwei]

@tombuildsstuff , Thanks for you comment. I've updated code.

[ghost]

This has been released in version 1.37.0 of the provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading. As an example:

provider "azurerm" {
    version = "~> 1.37.0"
}
# ... other configuration ...

[ghost]

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If you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. If you feel I made an error 🤖 🙉 , please reach out to my human friends 👉 hashibot-feedback@hashicorp.com. Thanks!