Update rosbridge_server/launch/rosbridge_websocket_launch.xml

Co-authored-by: Błażej Sowa <bsowa123@gmail.com>

Author: FlorianLebecque

rosbridge_server/launch/rosbridge_websocket_launch.xml

@@ -6,7 +6,7 @@
   <arg name="certfile" default=""/>
   <arg name="keyfile" default="" />
 
-  <arg name="namespace" default="ws" />
+  <arg name="namespace" default="" />
 
   <arg name="retry_startup_delay" default="5.0" />