Reword option label for sending emails

ee/app/views/projects/settings/operations/_incidents.html.haml

@@ -28,5 +28,5 @@
               = icon('chevron-down')
           .form-group
             = form.check_box :send_email
-            = form.label :send_email, _('Send an email notification to Developers.'), class: 'form-check-label'
+            = form.label :send_email, _('Send a separate email notification to Developers.'), class: 'form-check-label'
       = f.submit _('Save changes'), class: 'btn btn-success'

ee/spec/features/projects/settings/operations_settings_spec.rb

@@ -7,7 +7,7 @@ describe 'Projects > Settings' do
   let(:project) { create(:project, :repository, create_templates: :issue) }
   let(:role) { :maintainer }
   let(:create_issue) { 'Create an issue. Issues are created for each alert triggered.' }
-  let(:send_email) { 'Send an email notification to Developers.' }
+  let(:send_email) { 'Send a separate email notification to Developers.' }
 
   before do
     create(:project_incident_management_setting, send_email: true, project: project)

locale/gitlab.pot

@@ -11875,7 +11875,7 @@ msgstr ""
 msgid "Selecting a GitLab user will add a link to the GitLab user in the descriptions of issues and comments (e.g. \"By <a href=\"#\">@johnsmith</a>\"). It will also associate and/or assign these issues and comments with the selected user."
 msgstr ""
 
-msgid "Send an email notification to Developers."
+msgid "Send a separate email notification to Developers."
 msgstr ""
 
 msgid "Send confirmation email"