fix changelog links

Author: vincentsarago

CHANGES.md

@@ -615,7 +615,8 @@ Full changelog: https://stac-utils.github.io/stac-fastapi/migrations/v3.0.0/#cha
 
 * First PyPi release!
 
-[Unreleased]: <https://github.com/stac-utils/stac-fastapi/compare/5.1.1..main>
+[Unreleased]: <https://github.com/stac-utils/stac-fastapi/compare/5.2.0..main>
+[5.2.0]: <https://github.com/stac-utils/stac-fastapi/compare/5.1.1..5.2.0>
 [5.1.1]: <https://github.com/stac-utils/stac-fastapi/compare/5.1.0..5.1.1>
 [5.1.0]: <https://github.com/stac-utils/stac-fastapi/compare/5.0.3..5.1.0>
 [5.0.3]: <https://github.com/stac-utils/stac-fastapi/compare/5.0.2..5.0.3>