refactor artifacts.go:41
for single branch pipeline artifacts downloads URI
artifactURL := fmt.Sprintf("/job/%s/job/%s/%d/artifact/%s", projectName, pipelineName, buildID, filename)
multi_branch_pipeline artifacts downloads URI
artifactURL := fmt.Sprintf("/job/%s/job/%s/job/%s/%d/artifact/%s", projectName, pipelineName, branchName, buildID, filename)