docs(CHANGES): Updates for #919

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: 0.33.0 -> 0.34.0 (#919)
+
+  Explicit targets in `cmd()`
+
 ## tmuxp 1.41.1 (2024-03-17)
 
 _Maintenance only, no bug fixes or new features_