docs: Update README (#25)

* docs: Update README

* wordsmithing

Author: psyclaudeZ

README.md

@@ -18,9 +18,10 @@ Add to your `.tmux.conf`:
 
 ```bash
 set-hook -g server-start "run-shell 'tbdmd start'"
-set-hook -g server-exit "run-shell 'tbdmd stop'"
 ```
 
+Note that `session-closed` hook is currently broken in tmux 3.5a and doesn't get triggered as expected. Therefore, `tbdmd` automatically shuts down when it detects the tmux session no longer exists.
+
 ### 2. Configure vim
 
 Add to your `.vimrc` or `init.vim`: