Update version

Author: kratman

CHANGELOG.md

@@ -1,5 +1,7 @@
 # [Unreleased](https://github.com/pybamm-team/PyBaMM/)
 
+# [v25.6.0](https://github.com/pybamm-team/PyBaMM/tree/v25.6.0) - 2025-05-27
+
 ## Features
 
 - Renamed MSMR parameters from symbols to written out names with units as a non-breaking change with a deprecation warning. ([#5027](https://github.com/pybamm-team/PyBaMM/pull/5027))

CITATION.cff

@@ -24,6 +24,6 @@ keywords:
   - "expression tree"
   - "python"
   - "symbolic differentiation"
-version: "25.4.2"
+version: "25.6.0"
 repository-code: "https://github.com/pybamm-team/PyBaMM"
 title: "Python Battery Mathematical Modelling (PyBaMM)"