docs(CHANGES): Fix release version

Author: tony

CHANGES

@@ -9,12 +9,14 @@ To install via [pip](https://pip.pypa.io/en/stable/), use:
 $ pip install --user --upgrade --pre libtmux
 ```
 
-## libtmux 0.33.x (Yet to be released)
+## libtmux 0.34.x (Yet to be released)
 
 - _Future release notes will be placed here_
 
 <!-- To maintainers and contributors: Please add notes for the forthcoming version above -->
 
+## libtmux 0.33.0 (2024-03-17)
+
 ### Breaking changes
 
 #### Improved new sessions (#532)