MITRE ATT&CK Intelligence flyout text is too light

[asteriscos]

Wazuh	Rev	Browser
4.9.0	06	Chrome, Firefox, Safari, etc

Description
The description in the MITRE ATT&CK -> Intelligence -> details flyout is too light and difficult to read. We need to use a darker grey to improve readability.

Steps to reproduce

1. Navigate to MITRE ATT&CK -> Intelligence
2. Click on an element of the table

Screenshots