Apply YARA recommendations - AR with YARA

[TomasTurina]

Description

This PR addresses the changes to YARA guide recommended in:

• Non working URL in Blocking a Malicious Actor PoC  #6886
• Error in script on File integrity monitoring and YARA #6888
• Add steps to Yara installation in File integrity monitoring and YARA #6892

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.