docs(CHANGES): Note v1.10.x python 3.7 and 3.8 service branch

Author: tony

CHANGES

@@ -15,10 +15,17 @@ $ pipx install --suffix=@next 'tmuxp' --pip-args '\--pre' --force
 // Usage: tmuxp@next load yoursession
 ```
 
-## 0.10 - unreleased
+## 1.10 - unreleased
 
 - _Insert changes/features/fixes for next release here_
 
+### Compatibility
+
+- Final python 3.7 and 3.8 release
+
+  Bug fixes and security updates will go to
+  [`v1.10.x`](https://github.com/tmux-python/tmuxp/tree/v1.10.x)
+
 ### What's new
 
 - {issue}`747`: Skip execution via `enter: false`