disable pinch links in gazebo

Signed-off-by: Paul Gesel <paulgesel@gmail.com>

src/picknik_ur_gazebo_config/config/config.yaml

@@ -57,6 +57,7 @@ hardware:
     urdf_params:
       - name: "%>> hardware.type"
       - gripper_name: "robotiq_85"
+      - use_pinch_links: "false"
       # Using the ogre renderer as it is compatible with most host hardware.
       # ogre2 (which is the Gazebo default) is also an option if your system supports it.
       - gazebo_renderer: ${GAZEBO_RENDERER:-ogre}