atest: clarify readme
atest: clarify readme

robotframework/robotframework,jaloren/robotframework,moto-timo/robotframework,snyderr/robotframework,moto-timo/robotframework,moto-timo/robotframework,joongh/robotframework,moto-timo/robotframework,alexandrul-ci/robotframework,jaloren/robotframework,robotframework/robotframework,synsun/robotframework,moto-timo/robotframework,alexandrul-ci/robotframework,synsun/robotframework,synsun/robotframework,HelioGuilherme66/robotframework,HelioGuilherme66/robotframework,alexandrul-ci/robotframework,snyderr/robotframework,robotframework/robotframework,snyderr/robotframework,alexandrul-ci/robotframework,snyderr/robotframework,jaloren/robotframework,joongh/robotframework,jaloren/robotframework,synsun/robotframework,joongh/robotframework,snyderr/robotframework,jaloren/robotframework,HelioGuilherme66/robotframework,synsun/robotframework,joongh/robotframework,alexandrul-ci/robotframework,joongh/robotframework