Casting to detect collision includes trigger colliders

I am using a custom platformer physics script from a tutorial

https://learn.unity.com/tutorial/live-session-2d-platformer-character-controller

For my game, the player has a melee attack, and I figured I could do damage by having a collider set as a trigger that is enabled when the player is attacking, and disabled when not attacking.

The script uses a RigidBody2D.Cast to detect how the player is colliding with the environment.

The following code sets up the contactFilter that will be used by this cast

 protected ContactFilter2D contactFilter;
 void Start()
     {
         contactFilter.SetLayerMask(Physics2D.GetLayerCollisionMask(0));
         contactFilter.useLayerMask = true;
         contactFilter.useTriggers = false;
     }

I assumed that "contactFilter.useTriggers = false;" would make it so that the melee collider that is a trigger will not be used in the cast. However, it seems to be used anyway, since when I attack with the player, he has the collider as a hitbox that interacts with the environment.

How can I make it so that the trigger collider is not used in this cast?

also, here is where the cast happens

 void Movement(Vector2 move, bool yMovement)
     {
         float distance = move.magnitude;
 
         if (distance > minMoveDistance)
         {
             int count = rb2d.Cast(move, contactFilter, hitBuffer, distance + shellRadius);
             hitBufferList.Clear();
             for (int i = 0; i < count; i++)
             {
                 hitBufferList.Add(hitBuffer[i]);
             }
 
             for (int i = 0; i < hitBufferList.Count; i++)
             {
                 Vector2 currentNormal = hitBufferList[i].normal;
                 if (currentNormal.y > minGroundNormalY)
                 {
                     grounded = true;
                     if (yMovement)
                     {
                         groundNormal = currentNormal;
                         currentNormal.x = 0;
                     }
                 }
 
                 float projection = Vector2.Dot(velocity, currentNormal);
                 if (projection < 0)
                 {
                     velocity = velocity - projection * currentNormal;
                 }
 
                 float modifiedDistance = hitBufferList[i].distance - shellRadius;
                 distance = modifiedDistance < distance ? modifiedDistance : distance;
             }
 
 
         }
 
         rb2d.position = rb2d.position + move.normalized * distance;
     }