Update README.md to remove '$ ' so that you can copy and run command

[Felipegalind0]

because of the extra '$ ' this happens:

(spot_mini_env) vscode@gdogv10:~/catkin_ws/src$ $ roslaunch --screen foxglove_bridge foxglove_bridge.launch port:=8765
bash: $: command not found

Changelog

fixed typo in readme so you can paste commands to the terminal

Description

I forget the command to start foxglove bridge, so I google 'foxglove bridge github', end up at the README, copy and paste the command to my terminal and then this happens:

(spot_mini_env) vscode@gdogv10:~/catkin_ws/src$ $ roslaunch --screen foxglove_bridge foxglove_bridge.launch port:=8765
bash: $: command not found

the extra '$ ' needs to be removed...

[CLAassistant]

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