update changelog

Author: tylanderson

CHANGELOG.md

@@ -22,6 +22,7 @@
 - Add example of custom `StacIO` for Azure Blob Storage to docs ([#1372](https://github.com/stac-utils/pystac/pull/1372))
 - Noted that collection links can be used in non-item objects in STAC v1.1.0 ([#1393](https://github.com/stac-utils/pystac/pull/1393))
 - Move test, docs, and bench requirements out of pyproject.toml ([#1407](https://github.com/stac-utils/pystac/pull/1407))
+- Clarify inclusive datetime ranges, update default license, and ensure description is not empty ([#1445](https://github.com/stac-utils/pystac/pull/1445))
 
 ### Fixed