Fun with lasers: set texture offset of the linerenderer material

Hello,
I was doing the "Fun with lasers" tutorial:
https://unity3d.com/fr/learn/tutorials/topics/graphics/fun-lasers?playlist=17102

and I have an issue towards the end, when having to set the texture offset of the linerenderer material.

I already asked google but couldn't find info on the new way to do that.

Thanks.