Ground Check not working on edges

Hey, I'm making a way for my 3D character check the ground with a raycast, but since the raycast is a line, when the player is standing on the edge of a block, for example, it considers as if the character is on air. Any ideas on how to fix this? Here is the code and a visual representation

         // ground check
         grounded = Physics.Raycast(transform.position, Vector3.down, playerHeight * 0.5f + 0.02f, whatIsGround);![alt text][1]

[1]: /storage/temp/204164-image-2023-01-23-230333326.png