[DOC] Update changelog, prepare 1.6.0 release (#308)

Co-authored-by: Felix Dangel <[email protected]>

changelog.md

@@ -6,6 +6,25 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.6.0] - 2023-06-26
+
+With this patch, BackPACK supports `torch==2.x` and deprecates `python3.7`
+([PR](https://github.com/f-dangel/backpack/pull/307)).
+
+### Added/New
+- Example use case for `retain_graph`
+  ([PR](https://github.com/f-dangel/backpack/pull/302))
+
+### Internal
+- Update code to latest `black` and `flake8`
+  ([PR](https://github.com/f-dangel/backpack/pull/301))
+- Fix examples on splash page
+  ([PR](https://github.com/f-dangel/backpack/pull/298))
+
+## [1.5.2] - 2022-12-19
+
+This patch adds support for `torch>=1.13.0` to BackPACK.
+
 ## [1.5.1] - 2022-11-03
 
 This patch fixes temporary compatibility issues with the latest PyTorch release.
@@ -386,7 +405,9 @@ co-authoring many PRs shipped in this release.
 
 Initial release
 
-[Unreleased]: https://github.com/f-dangel/backpack/compare/v1.5.1...HEAD
+[Unreleased]: https://github.com/f-dangel/backpack/compare/v1.6.0...HEAD
+[1.6.0]: https://github.com/f-dangel/backpack/compare/1.5.2...1.6.0
+[1.5.2]: https://github.com/f-dangel/backpack/compare/1.5.2...1.5.1
 [1.5.1]: https://github.com/f-dangel/backpack/compare/1.5.1...1.5.0
 [1.5.0]: https://github.com/f-dangel/backpack/compare/1.5.0...1.4.0
 [1.4.0]: https://github.com/f-dangel/backpack/compare/1.4.0...1.3.0