Add a tag to a Step Functions resource.
See https://www.paws-r-sdk.com/docs/sfn_tag_resource/ for full documentation.
sfn_tag_resource(resourceArn, tags)
[required] The Amazon Resource Name (ARN) for the Step Functions state machine or activity.
[required] The list of tags to add to a resource.
Tags may only contain Unicode letters, digits, white space, or these
symbols: _ . : / = + - @
.