Switched to rbx-2 instead of rbx for CI
Switched to rbx-2 instead of rbx for CI

oesgalha/awesome_nested_set,collectiveidea/awesome_nested_set,sximba/rational_nested_set,markmercedes/awesome_nested_set,petergoldstein/awesome_nested_set,sximba/rational_nested_set,rbo7nik/awesome_nested_set,tcjuan/awesome_nested_set,experteer/awesome_nested_set