Update README.md

README.md

@@ -61,7 +61,7 @@ Install required packages:
 If a workspace does not yet exist in which the driver is to be used, create and initialize it:
 
     mkdir catkin_ws
-    cd catḱin_ws
+    cd catkin_ws
     mkdir src
     catkin init
     catkin config --extend /opt/ros/melodic/