Fix typo

franka_example_controllers/launch/elbow_example_controller.launch

@@ -8,6 +8,6 @@
   </include>
 
   <rosparam command="load" file="$(find franka_example_controllers)/config/franka_example_controllers.yaml" />
-  <node name="controller_spawner" pkg="controller_manager" type="spawner" respawn="false" output="screen"  args="elbowf_example_controller"/>
+  <node name="controller_spawner" pkg="controller_manager" type="spawner" respawn="false" output="screen"  args="elbow_example_controller"/>
   <node pkg="rviz" type="rviz" output="screen" name="rviz" args="-d $(find franka_example_controllers)/launch/robot.rviz"/>
 </launch>