renaming rake tasks to touch debates and proposals

lib/tasks/debates.rake

@@ -1,6 +1,6 @@
 namespace :debates do
   desc "Updates all debates by recalculating their hot_score"
-  task hot_score: :environment do
+  task touch: :environment do
     Debate.find_in_batches do |debates|
       debates.each(&:save)
     end

lib/tasks/proposals.rake

@@ -1,6 +1,6 @@
 namespace :proposals do
   desc "Updates all proposals by recalculating their hot_score"
-  task hot_score: :environment do
+  task touch: :environment do
     Proposal.find_in_batches do |proposals|
       proposals.each(&:save)
     end