Add instruction for opening issues with traffic files in Dev Guide (#1109)
Add instruction for opening issues with traffic files in Dev Guide (#1109)

Update "Submitting an Issue" section on DevGuide, adding a bullet to instruct users to attach traffic files, if they do not contain sensitive information.

Co-authored-by: josemauro <8784a9f56c288c2a58415dbcd0dacb829b8746cd@live.com>
kytos/kytos,kytos/kyco