Added note for Ansible - CentOS8 installation

[davidcr01]

Description

Parent issue
wazuh/wazuh-ansible#967

The aim of this PR is to add a note in the Ansible installation for CentOS8. In this system, the specified commands in the documentation did not work. After some research, the correct commands have been added to the documentation.

Checks

Docs building

• Compiles without warnings.

Code formatting and web optimization

• Uses three spaces indentation.
• Adds or updates meta descriptions accordingly.
• Updates the redirects.js script if necessary (check this guide).

Writing style

• Uses present tense, active voice, and semi-formal registry.
• Uses short, simple sentences.
• Uses bold for user interface elements, italics for key terms or emphasis, and code font for Bash commands, file names, REST paths, and code.