Fix DOI for v0.6.0 in the Changelog (#274)

It was the v0.5 DOI for some reason. I checked this twice but didn't
catch it.

Author: leouieda

doc/changes.rst

@@ -8,7 +8,7 @@ Version 0.6.0
 
 Released on: 2026/03/30
 
-DOI: https://doi.org/10.5281/zenodo.13975491
+DOI: https://doi.org/10.5281/zenodo.19333956
 
 Breaking changes: