Use IID instead of issue ID to update title

ee/app/models/ee/issue.rb

@@ -135,7 +135,7 @@ module EE
     private
 
     def update_generic_alert_title_if_applicable
-      update_column(:title, "#{title} #{id}") if generic_alert_with_default_title?
+      update_attributes(title: "#{title} #{iid}") if generic_alert_with_default_title?
     end
 
     def generic_alert_with_default_title?

ee/spec/models/issue_spec.rb

@@ -13,7 +13,7 @@ describe Issue do
       let(:author) { User.alert_bot }
 
       context 'when issue title is "New: Incident"' do
-        let(:issue) { build(:issue, project: project, author: author, title: 'New: Incident') }
+        let(:issue) { build(:issue, project: project, author: author, title: 'New: Incident', iid: 503503) }
 
         context 'when alerts service is active' do
           before do
@@ -24,7 +24,7 @@ describe Issue do
             it 'updates issue title with the IID' do
               issue.save
 
-              expect(issue.reload.title).to eq("New: Incident #{issue.id}")
+              expect(issue.reload.title).to eq("New: Incident 503503")
             end
           end