Improve readability of code

scripts/trigger-build

@@ -5,14 +5,17 @@ require 'json'
 uri = URI('https://gitlab.com/api/v4/projects/20699/trigger/pipeline')
 params = {
-  "token" => ENV['BUILD_TRIGGER_TOKEN'],
-  "variables[GITLAB_VERSION]" => ENV['CI_COMMIT_SHA'],
+  "ref" => ENV["OMNIBUS_BRANCH"] || "master",
+  "token" => ENV["BUILD_TRIGGER_TOKEN"],
+  "variables[GITLAB_VERSION]" => ENV["CI_COMMIT_SHA"],
   "variables[ALTERNATIVE_SOURCES]" => true,
 }
-params['ref'] = ENV['OMNIBUS_BRANCH'] || "master"
+
 Dir.glob("*_VERSION").each do |version_file|
   params["variables[#{version_file}]"] = File.read(version_file).strip
 end
+
 res = Net::HTTP.post_form(uri, params)
 pipeline_id = JSON.parse(res.body)['id']
+
 puts "Triggered pipeline can be found at https://gitlab.com/gitlab-org/omnibus-gitlab/pipelines/#{pipeline_id}"