envsetup: use latest tagged version of behave

Stable behave is years old by now, latest tagged commit in its main is a bit better at 1.5 year old as of today. Let's switch to it to see if there are any problems.

Links:

• https://github.com/behave/behave/discussions/1030
• https://github.com/behave/behave/issues/1059
• https://github.com/behave/behave/issues/855#issuecomment-1058888099

RunTests:*