Fix invalid Jinja2 syntax

[Zenidd]

This PR was originally opened by @kravietz

Description

localfiles blocks with format = json and labels were not correctly rendered. The following settings led to error:

      - format: 'json'
        location: '/path/to/logs/test.log'
        labels: 
          - key: '@source'
            value: myapp
          - key: '@source2'
            value: myapp2

Related Ansible error:

TASK [../roles/wazuh/ansible-wazuh-manager : Configure the shared-agent.conf] *******************************************************************************************************************
fatal: [test]: FAILED! => {"changed": false, "msg": "AnsibleUndefinedVariable: 'list object' has no attribute 'items'"}

---

After adding the @kravietz fix, the Configure the shared-agent.conf task ends successfully and the localfile configuration block is rendered as expected:

TASK [../roles/wazuh/ansible-wazuh-manager : Configure the shared-agent.conf] *******************************************************************************************************************
changed: [test]

Correct output localfile block inside agent.conf file

    <localfile>
       <log_format>json</log_format>
       <location>/path/to/logs/test.log</location>
       <label key="@source">myapp</label>
       <label key="@source2">myapp2</label>
    </localfile>