Allow multiple directories in tfsec_actions_working_dir

[WebSpider]

In a repository where there are multiple terraform plans, you currently have to invoke this action multiple times, each with a seperate tfsec_actions_working_dir.

It would be great if the argument would accept a list of directories, instead of one`

[triat]

@WebSpider I've tried to do a PR for this request, but I'm actually not sure tfsec accept a list of directories. I would rather keep the same behaviour as tfsecfor this action.

Now I wonder if this has been removed, I mean the multi directory support, as I remember that I tried and it was working ... maybe a mistake from my side.