fix: avoid warm up on update like before

it will avoid a bunch of unecessary updates

lib/rating/models/rating/extension.rb

@@ -44,7 +44,7 @@ module Rating
 
     module ClassMethods
       def rating(as: nil, scoping: nil)
-        after_save -> { rating_warm_up scoping: scoping }, unless: -> { as == :author }
+        after_create -> { rating_warm_up scoping: scoping }, unless: -> { as == :author }
 
         has_many :rating_records,
           as:         :resource,

spec/models/extension/after_create_spec.rb

@@ -2,11 +2,11 @@
 
 require 'rails_helper'
 
-RSpec.describe Rating::Extension, 'after_save' do
+RSpec.describe Rating::Extension, 'after_create' do
   context 'when record is author' do
     let!(:record) { build :author }
 
-    it 'does warm up the cache' do
+    it 'does not warm up the cache' do
       expect(record).not_to receive(:rating_warm_up)
 
       record.save
@@ -33,5 +33,15 @@ RSpec.describe Rating::Extension, 'after_save' do
         record.save
       end
     end
+
+    context 'when update is made' do
+      let!(:record) { create :comment }
+
+      it 'does not warm up the cache' do
+        expect(record).not_to receive(:rating_warm_up)
+
+        record.save
+      end
+    end
   end
 end