Upgrade to terraform-docs 0.13.0

[wagnst]

As per https://github.com/terraform-docs/terraform-docs/releases/tag/v0.13.0
There is new terraform-docs version. Please update the actions (and readme) as well.

Seems a new container image is needed and to be referenced here: https://github.com/terraform-docs/gh-actions/blob/main/Dockerfile#L15

[bakayolo]

I made this https://github.com/bappr/terraform-docs-gh-actions that you can use with uses: bappr/terraform-docs-gh-actions@bappr/update-to-0.13.0
Will not PR it since the official GHA is using a docker image directly and not rebuilding it.

[fatbasstard]

Thanks @bappr , your fork works like a charm.

Would be great if could be "officially" implemented here

[khos2ow]

Apology for the delay, this is now fixed and will be available shortly in v0.7.0.