release: Update CHANGELOG.md for 1.9.0

Author: nim65s

CHANGELOG.md

@@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.9.0] - 1980-01-01
+
 - Fix value of nEq when removeRigidContact for contact with priority > 0
 - update jrl-cmakemodules to v1
 - CMake: honor BUILD_STANDALONE_PYTHON_INTERFACE option
@@ -178,7 +180,8 @@ It also fixes some issues with respect to the packaging.
 This is the first release of TSID.
 This release includes minimal features for the torque control of humanoid robots such as HRP-2.
 
-[Unreleased]: https://github.com/stack-of-tasks/tsid/compare/v1.8.0...HEAD
+[Unreleased]: https://github.com/stack-of-tasks/tsid/compare/v1.9.0...HEAD
+[1.9.0]: https://github.com/stack-of-tasks/tsid/compare/v1.8.0...v1.9.0
 [1.8.0]: https://github.com/stack-of-tasks/tsid/compare/v1.7.1...v1.8.0
 [1.7.1]: https://github.com/stack-of-tasks/tsid/compare/v1.7.0...v1.7.1
 [1.7.0]: https://github.com/stack-of-tasks/tsid/compare/v1.6.3...v1.7.0