sim: fix race condition in tmux script (#22365)

* carla simulator tmux script enhancement

* real name

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

tools/sim/tmux_script.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
-tmux new -d -s htop
+tmux new -d -s carla-sim
 tmux send-keys "./launch_openpilot.sh" ENTER
 tmux neww
 tmux send-keys "./bridge.py $*" ENTER
-tmux a
+tmux a -t carla-sim