update on ssl.rst to resolve renew issue

[shameemshah]

Without copying the renewed certificate, Wazuh can't renew the SSL certificate. To resolve this, add a copy command in the renewal hook to copy the latest certificate to the Wazuh cert folder.

Description

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.

[shameemshah]

@ayodeko please validate