docs(examples) Remove tmux 3.0 version note for environment variables

Environment variable support is always available now that tmux 3.2+ is
the minimum version.

Author: tony

docs/configuration/examples.md

@@ -266,8 +266,7 @@ tmuxp will set session, window and pane environment variables.
 
 ```{note}
 
-Setting environment variables for windows and panes requires tmuxp 1.19 or
-newer and tmux 3.0 or newer.
+Setting environment variables for windows and panes requires tmuxp 1.19 or newer.
 ```
 
 ````{tab} YAML