Update analytics docs links for some metrics

What does this MR do and why?

• Fixes broken docs links for Lead time and Cycle time
• Improve docs link for Code suggestions

MR acceptance checklist

Please evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Enable AI impact dashboard FF:

Feature.enable(:ai_impact_analytics_dashboard)

2. Navigate to the AI impact dashboard for any group

http://gdk.test:3000/groups/flightjs/-/analytics/dashboards/ai_impact

3. For Cycle time, Lead time and Code Suggestions usage metrics:
   • 
   • Click the Go to docs link in the tooltip next to the metric name. Verify that the correct docs link opens

Related to #455662 (closed)