Update changelog

Nathan Rebours · Nathan Rebours · commit 4a560fe5ede2 · 2026-03-03T17:00:18.000+01:00
Signed-off-by: Nathan Rebours &lt;nathan.rebours@ocamlpro.com&gt;
diff --git a/CHANGES.md b/CHANGES.md
@@ -1,6 +1,9 @@
 unreleased
 ----------
 
+- Add support for OCaml 5.4 bivariant type parameters, they can now be used
+  alongside ppx-es. (#629, @NathanReb)
+
 - Add Ast_builder and Ast_pattern utilities to manipulate encoded
   effect patterns (#624, @NathanReb)
 
