Remove tags from an App Runner resource.
See https://www.paws-r-sdk.com/docs/apprunner_untag_resource/ for full documentation.
apprunner_untag_resource(ResourceArn, TagKeys)
[required] The Amazon Resource Name (ARN) of the resource that you want to remove tags from.
It must be the ARN of an App Runner resource.
[required] A list of tag keys that you want to remove.