add link references in changelogs

Author: Phil Varner

stapi-fastapi/CHANGELOG.md

@@ -140,6 +140,7 @@ Initial release
 - Add links `opportunities` and `create-order` to Product
 - Add link `create-order` to OpportunityCollection
 
+[0.8.0]: https://github.com/stapi-spec/stapi-fastapi/tree/v0.8.0
 [0.7.1]: https://github.com/stapi-spec/stapi-fastapi/tree/v0.7.1
 [0.7.0]: https://github.com/stapi-spec/stapi-fastapi/tree/v0.7.0
 [0.6.0]: https://github.com/stapi-spec/stapi-fastapi/tree/v0.6.0

stapi-pydantic/CHANGELOG.md

@@ -50,6 +50,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 Initial release.
 
 [unreleased]: https://github.com/stapi-spec/pystapi/compare/stac-pydantic/stapi-pydantic%2Fv0.0.4...main
+[0.1.0]: https://github.com/stapi-spec/pystapi/compare/stac-pydantic/stapi-pydantic%2Fv0.0.4...stapi-pydantic%2Fv0.1.0
 [0.0.4]: https://github.com/stapi-spec/pystapi/compare/stac-pydantic/stapi-pydantic%2Fv0.0.3...stapi-pydantic%2Fv0.0.4
 [0.0.3]: https://github.com/stapi-spec/pystapi/compare/stac-pydantic/stapi-pydantic%2Fv0.0.2...stapi-pydantic%2Fv0.0.3
 [0.0.2]: https://github.com/stapi-spec/pystapi/compare/stac-pydantic/stapi-pydantic%2Fv0.0.1...stapi-pydantic%2Fv0.0.2