Added support for rake args

lib/blazer/tasks.rb

@@ -2,8 +2,8 @@ require "rake"
 
 namespace :blazer do
   desc "run checks"
-  task run_checks: :environment do
-    Blazer.run_checks(schedule: ENV["SCHEDULE"])
+  task :run_checks, [:schedule] => :environment do |t, args|
+    Blazer.run_checks(schedule: args[:schedule] || ENV["SCHEDULE"])
   end
 
   task send_failing_checks: :environment do