Fix the curl download command in message filter tutorial. (#3983) (#3984

)

Signed-off-by: Chris Lalancette <clalancette@gmail.com>
(cherry picked from commit 3b274d5)

Co-authored-by: Chris Lalancette <clalancette@gmail.com>

source/Tutorials/Intermediate/Tf2/Using-Stamped-Datatypes-With-Tf2-Ros-MessageFilter.rst

@@ -340,7 +340,7 @@ Inside the ``src/learning_tf2_cpp/src`` directory download file ``turtle_tf2_mes
 
     .. code-block:: console
 
-        curl -sk wget https://raw.githubusercontent.com/ros/geometry_tutorials/ros2/turtle_tf2_cpp/src/turtle_tf2_message_filter.cpp -o turtle_tf2_message_filter.cpp
+        curl -sk https://raw.githubusercontent.com/ros/geometry_tutorials/ros2/turtle_tf2_cpp/src/turtle_tf2_message_filter.cpp -o turtle_tf2_message_filter.cpp
 
     Or in powershell: