1.6.0: Bump changelog (#1434)

* 1.6.0: Bump changelog

* Update CHANGELOG.md

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: Bernát Gábor <bgabor8@bloomberg.net>

Author: github-actions[bot]

CHANGELOG.md

@@ -9,7 +9,7 @@ This project uses [*towncrier*](https://towncrier.readthedocs.io/) for keeping t
 
 <!-- towncrier release notes start -->
 
-## [1.6.0](https://github.com/pypa/pipx/tree/1.6.0) - 2024-05-28
+## [1.6.0](https://github.com/pypa/pipx/tree/1.6.0) - 2024-06-01
 
 
 ### Features