Fix no assignee text in sidebar_spec

app/assets/javascripts/sidebar/components/assignees/assignees.vue

@@ -184,7 +184,7 @@ export default {
         <i aria-hidden="true" data-hidden="true" class="fa fa-exclamation-triangle"></i>
       </span>
       <template v-if="hasNoUsers">
-        <span class="assign-yourself no-value">
+        <span class="assign-yourself no-value qa-assign-yourself">
           None
           <template v-if="editable">
             - <button type="button" class="btn-link" @click="assignSelf">assign yourself</button>

ee/spec/features/boards/sidebar_spec.rb

@@ -91,7 +91,7 @@ describe 'Issue Boards', :js do
 
         wait_for_requests
 
-        expect(page).to have_content('No assignee')
+        expect(find('.qa-assign-yourself')).to have_content('None')
       end
 
       expect(card_two).not_to have_selector('.avatar')
@@ -101,7 +101,7 @@ describe 'Issue Boards', :js do
       click_card(card2)
 
       page.within(find('.assignee')) do
-        expect(page).to have_content('No assignee')
+        expect(find('.qa-assign-yourself')).to have_content('None')
 
         click_button 'assign yourself'