[Internal]: Mention product docs configuration for air-gapped env on Security AI assistant page

[darnautov]

Description

There’s a section for the Elastic documentation on the Observability AI Assistant page:
https://www.elastic.co/docs/solutions/observability/observability-ai-assistant#obs-ai-product-documentation

This setting should also be referenced on the Security AI Assistant page:
https://www.elastic.co/docs/solutions/security/ai/ai-assistant

Resources

This feature was implemented in elastic/kibana#217046

AI Assistant settings in Kibana: https://www.elastic.co/docs/reference/kibana/configuration-reference/ai-assistant-settings

Github link to the MD file: https://github.com/elastic/kibana/blob/main/docs/reference/configuration-reference/ai-assistant-settings.md

Which documentation set does this change impact?

Elastic On-Prem only

Feature differences

Considering the nature of this feature, it should be relevant for on-prem.

What release is this request related to?

8.18

Serverless release

April 7, 2025

Collaboration model

The documentation team

Point of contact.

Main contact: @darnautov

Stakeholders: @sorenlouv, @spong