UPDATE: The answer below is for Blender 2.92, in the experimental build 2.93.0 Alpha this already works. Keep the nodes in the order described down here. Set _Vector_ to _Attribute_ and enter the value vertex_normal.

For Blender 2.92: Not the answer to get it working (because it doesn't in this or older versions), jut a quick explanation of how to setup the nodes and what they do.

The _Align Rotation to Vector_ node rotates the points of the plane object according to values you enter in there (if _Vector_ option set to _Vector_ instead of _Attribute_). Which means, you have to put it before the _Point Instance_ node to have an effect on the rotation of the instanced objects.

However, this only rotates all points into the same direction for X/Y/Z given by the three values entered there (all set to 0 would mean, the rotation isn't changed at all).

So _Attribute_ must be the option to choose I guess - and this is the point where someone should take over who knows how to get the vertex normals. I don't know and can't find a list which attribute names Blender understands, but in my opinion the attribute which gets the vertex normal must be put in there and it should work as you want it.

I just watched a Youtube video on geometry nodes and talking about the attributes it was mentioned that the normal attribute is still a work in progress and yet only used by the _Point Distribution_ node.