add changlog for 2.36

Changelog.md

 # Changelog
 
+## [2.36] - 2025-02-11
+- Make use of already available app_settings instead of calling os environment
+- Hotfix sharepoint interaction (2 attempts)
+- Use shared_task instead of celery decorator
+- Use externally defined lists for L3 Core and layer 2 circuit service types to avoid unit tests falling out of sync
+- Add bulk migration for an edge port
+- Add L3 Core Service migration
+
 ## [2.35] - 2025-01-30
 - Fix a bug in the L3 Core Service validation workflow