Update add assignee selector in more specs

spec/support/components/work_packages/relations.rb

@@ -176,7 +176,7 @@ module Components
           next if page.has_selector?('.wp-relations--children .ng-input input')
 
           SeleniumHubWaiter.wait
-          find('.wp-inline-create--reference-link', text: I18n.t('js.relation_buttons.add_existing_child')).click
+          find('[data-qa-selector="op-wp-inline-create-reference"]', text: I18n.t('js.relation_buttons.add_existing_child')).click
 
           # Security check to be sure that the autocompleter has finished loading
           page.find '.wp-relations--children .ng-input input'

spec/support/pages/work_packages/work_packages_table.rb

@@ -134,7 +134,7 @@ module Pages
       # there is a delay on travis where inline create can be clicked.
       sleep 3
 
-      container.find('.wp-inline-create--add-link').click
+      container.find('[data-qa-selector="op-wp-inline-create"]').click
       expect(container).to have_selector('.wp-inline-create-row', wait: 10)
     end