Update README

Author: ManifoldFR

CHANGELOG.md

@@ -9,6 +9,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Fixed
 * Fix an arcane compilation issue on Clang-19 ([#379](https://github.com/Simple-Robotics/proxsuite/pull/379))
 
+### Changed
+* Upgrade nanobind submodule to v2.5.0 ([#378](https://github.com/Simple-Robotics/proxsuite/pull/378))
+
 ## [0.7.1] - 2025-01-28
 
 ### Fixed