docs(CHANGES): Note libtmux v0.22.2 bump

Author: tony

CHANGES

@@ -19,6 +19,14 @@ $ pipx install --suffix=@next 'tmuxp' --pip-args '\--pre' --force
 
 <!-- Maintainers, insert changes / features for the next release here -->
 
+## tmuxp 1.28.2 (unreleased)
+
+### Packaging
+
+- libtmux v0.22.1 -> v0.22.2
+
+  Removes `setuptools` from `build-system` requirements
+
 ## tmuxp 1.28.1 (2023-05-28)
 
 _Maintenance only, no bug fixes, or new features_