docs(CHANGES): Note libtmux v0.32.0

Author: tony

CHANGES

@@ -19,6 +19,12 @@ $ pipx install --suffix=@next 'tmuxp' --pip-args '\--pre' --force
 
 <!-- Maintainers, insert changes / features for the next release here -->
 
+### Breaking changes
+
+- libtmux: 0.31.0.post0 -> 0.32.0 (#914)
+
+  Export fix, ruff 0.3.0 updates.
+
 ### Development
 
 - ruff 0.2.2 -> 0.3.0 (#913)