message: Update doc string for complex_ior
diff: A node for converting scientific/complex IOR to the artistic IOR used by the conductor_brdf node.
  -->
  <nodedef name="ND_complex_ior" node="complex_ior" type="multioutput" nodegroup="pbr"
  - doc="A node for converting scientific/complex IOR to the artistic IOR used by the conductorbsdf node.">
  + doc="A node for converting scientific/complex IOR to the artistic IOR used by the conductor_brdf node.">
  <input name="ior" type="vector3"/>
  <input name="extinction" type="vector3"/>
  <output name="reflectivity" type="color3"/>
  