Bump ruby to 2.7.1 in CI
Bump ruby to 2.7.1 in CI

deivid-rodriguez/activeadmin,javierjulio/activeadmin,javierjulio/activeadmin,activeadmin/activeadmin,javierjulio/activeadmin,activeadmin/activeadmin,deivid-rodriguez/activeadmin,activeadmin/activeadmin,deivid-rodriguez/activeadmin