Update CHANGELOG.md for v1.1.0 release

Author: emmanuelmathot

CHANGELOG.md

@@ -30,5 +30,5 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Best practices and asset roles
 
-[Unreleased]: <https://github.com/stac-extensions/sar/compare/v1.0.0...HEAD>
+[v1.1.0]: <https://github.com/stac-extensions/sar/compare/v1.0.0...v1.1.0>
 [v1.0.0]: <https://github.com/stac-extensions/sar/tree/v1.0.0>