AWS durable-functions documentation change
Summary
File was moved from 'advanced/serialization.md' to 'sdk-reference/state/serialization.md' and navigation structure was updated to reflect new documentation organization. The content appears largely unchanged but now resides under a different section of the documentation.
Security assessment
This change is purely organizational/structural - moving a file location and updating navigation links. There is no evidence of security vulnerability fixes, security feature additions, or security-related content changes. The diff shows only path changes, navigation menu updates, and breadcrumb adjustments without any substantive content modifications to the serialization documentation itself.