add changelog entry.

Author: kellertuer

Changelog.md

@@ -13,6 +13,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 * add keyword argument `is_feasible_error` to `interior_point_Newton` to control how to handle infeasible starting points (#556)
 * add keyword argument `at_init` to some debug options to control whether they print already at the initialisation and hence before the first iteration (#552)
 
+### Fixed
+
+* fixed a few typos in the documentation (#557)
+
 ## [0.5.29] November 26, 2025
 
 ### Added