DOC: Improve Code of Conduct wording
DOC: Improve Code of Conduct wording

Improve Code of Conduct wording about the consequences of unacceptable
behavior.

brainhackorg/brainhackorg.github.io,brainhackorg/brainhackorg.github.io,brainhackorg/brainhackorg.github.io,brainhackorg/brainhackorg.github.io