ObstacleAvoidingPlatformUnit: adding comment

source/RobotAPI/components/units/ObstacleAvoidingPlatformUnit/ObstacleAvoidingPlatformUnit.cpp

@@ -588,6 +588,7 @@ bool armarx::ObstacleAvoidingPlatformUnit::is_almost_reaching_target(const Eigen
 
         const float sim = cosine_similarity(target_direction, control_direction);
 
+        // if almost pointing into same direction
         if (sim > cos(M_PI_4f32))
         {
             return true;