resolves terraform version error

[Kevin-byt]

Overview of Changes

• What was changed

Testing

Was this tested with different Terraform versions?

[Kevin-byt]

I constantly got the error "Terraform not found. Please install Terraform before using CloudGoat." when running the cloudgoat.py script but Terraform was already installed in my system. I realized that the error was on how the regex expression to derive the version was being handled, which I have edited

[andrew-aiken]

LGTM

Thanks for making the regex a little cleaner.

[Kevin-byt]

My pleasure. Thank you