Set the default value of allow_higher_versions to no

[vikman90]

Description

This PR is related to:

• The manager shall reject agents with a high version by default wazuh#20366

We're switching the default value of option <allow_higher_versions> from yes to no. This PR aims to reflect such change in the reference.

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.

[Nicogp]

LGTM!