Updating 'Add new' wording

Author: ymao1

x-pack/plugins/triggers_actions_ui/public/application/sections/action_connector_form/action_form.test.tsx

@@ -361,7 +361,7 @@ describe('action_form', () => {
       `);
     });
 
-    it('does not render "Add new" button for preconfigured only action type', async () => {
+    it('does not render "Add new connector" button for preconfigured only action type', async () => {
       await setup();
       const actionOption = wrapper.find('[data-test-subj="preconfigured-ActionTypeSelectOption"]');
       actionOption.first().simulate('click');

x-pack/plugins/triggers_actions_ui/public/application/sections/action_connector_form/action_form.tsx

@@ -267,7 +267,7 @@ export const ActionForm = ({
                     }}
                   >
                     <FormattedMessage
-                      defaultMessage="Add new"
+                      defaultMessage="Add new connector"
                       id="xpack.triggersActionsUI.sections.alertForm.addNewConnectorEmptyButton"
                     />
                   </EuiButtonEmpty>