Fix nav entry for development/ai_features/
Add navigation item to global navigation
The development/ai_features.html page must have been moved without a redirect, and pipelines are failing: https://gitlab.com/gitlab-org/gitlab-docs/-/jobs/4981210520
Moved in Refactor AI features docs and add prompts engin... (gitlab!130391 - merged)
Edited by Marcin Sedlak-Jakubowski