Update CHANGELOG.md

Author: FBumann

CHANGELOG.md

@@ -81,6 +81,15 @@ If upgrading from v2.x, see the [v3.0.0 release notes](https://github.com/flixOp
 
 Until here -->
 
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+## [4.3.5] - 2025-11-29
+
+**Summary**: Fix zenodo again
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+If upgrading from v2.x, see the [v3.0.0 release notes](https://github.com/flixOpt/flixOpt/releases/tag/v3.0.0) and [Migration Guide](https://flixopt.github.io/flixopt/latest/user-guide/migration-guide-v3/).
+
+---
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 ## [4.3.4] - 2025-11-27
 
 **Summary**: Fix zenodo again