Fix min_points comparison check (ros-navigation#3795)

* Fix min_points checking

Signed-off-by: enricosutera <enricosutera@outlook.com>

nav2_collision_monitor/src/collision_detector_node.cpp

@@ -314,7 +314,7 @@ void CollisionDetector::process()
     state_msg->polygons.push_back(polygon->getName());
     state_msg->detections.push_back(
       polygon->getPointsInside(
-        collision_points) > polygon->getMinPoints());
+        collision_points) >= polygon->getMinPoints());
   }
 
   state_pub_->publish(std::move(state_msg));