Add changelog entry

Author: ValerianRey

CHANGELOG.md

@@ -50,6 +50,10 @@ changelog does not include internal changes that do not affect the user.
   of `autojac`.
 - Removed an unnecessary internal cloning of gradient. This should slightly improve the memory
   efficiency of `autojac`.
+- Increased the lower bounds of the torch (from 2.0.0 to 2.4.0) and numpy (from 1.21.0
+  to 1.23.0) dependencies to reflect what really works with torchjd. We now also run torchjd's tests
+  with the dependency lower-bounds specified in `pyproject.toml`, so we should now always accurately
+  reflect the actual lower-bounds.
 
 ## [0.8.1] - 2026-01-07