Jenkins pipeline to keep the carriage return

I have a pipeline script that takes two parameters, one is a server name, a string parameter TARGET_INSTANCE and the other is a multi-line string parameter LINES.

The pipeline code:

pipeline {
    agent any

    stages {
        stage('Update config file') {
                steps {
                    script {
                            echo "Update pg_hba.conf on ${env.TARGET_INSTANCE}"
    
                            ansiblePlaybook become: true,
                            colorized: true,
                            credentialsId: 'user_cred',
                            extras: "-e target_instance=${env.TARGET_INSTANCE} -e lines=${LINES}",
                            installation: 'ansible',
                            inventory: 'etc/ansible/hosts',
                            playbook: "google/ansible/update_conf.yml"
                      }
                  }
              }
          }
      }

Part of the update_conf.yml looks like this:

- name: Update config.conf
  ansible.builtin.blockinfile:
    state: present
    dest: /etc/pgsql/config.conf
    block: |
      {{ lines }}

If I give the multi-line parameter values like:

111111111
2222222
333333333
44444444

The script update_conf.yml only appends the /etc/pgsql/config.conf with the first line 111111111 and ignores the rest of the 3 lines. If I give the multi-line parameter values like:

111111111\n2222222\n333333333\n44444444

The script update_conf.yml will append the /etc/pgsql/config.conf with all 4 lines as expected.

Is there anyway that I can use

111111111
2222222
333333333
44444444

to update the config.conf with all 4 lines?

Thanks!