Add description and note for new parameters to generate_wazuh_msi.ps1 script to sign Windows packages

[jotacarma90]

Description

In this PR we want to add a brief description about the new parameters added in this wazuh/wazuh PR:

Its use is to give the possibility to the user to be able to indicate a specific certificate with his name and password, instead of the default option that selects the best match certificate of the Store.

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.