Make text "Active" be a label for "Active schedule" checkbox
What does this MR do?
Makes the text "Active" a label for #schedule_active at /${CI_PROJECT_PATH}/pipeline_schedules/${CI_SCHEDULE_ID}/edit and /${CI_PROJECT_PATH}/pipeline_schedules/${CI_SCHEDULE_ID}/new (accessible from the sidebar under CI/CD > Schedules > Edit and CI/CD > Schedules > New schedule).
Screenshots
Screenshot from adding/editing a pipeline schedule:
