Update 4.5.3 Release notes

[javimed]

Description

This PR updates 4.5.3 Release notes based on the following current changelogs:

• No new entries in current wazuh/wazuh changelog
• 1 new entry in current wazuh/wazuh-kibana-app changelog
• No entries in current wazuh/wazuh-splunk changelog
• No entries in current wazuh/wazuh-packages changelog

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.