Add Wazuh 4.5.3 release notes

[s-ocando]

Description

This PR adds the Wazuh 4.5.3 release notes document. We'll include the release changes as soon as the change logs for the various development branches are updated.

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.