fix tmux path

tasks/tmux.yaml

@@ -13,7 +13,7 @@
 
 - name: tmux systemd user service unit
   template:
-    src: tmux@.service.j2
+    src: tmux/tmux@.service.j2
     dest: ~/.config/systemd/user/tmux@.service
   notify: systemd daemon-reload