Update the Franka cloth motion-vector golden

Replacing MeshRectangleCfg.resolution with edge_refinement keeps the cloth
mesh geometrically identical, 81 vertices at the same positions, but flips
32 of the 64 quad diagonals: the removed grid generator alternated them,
while subdivide_to_size inherits one direction from its seed triangles.

That slightly changes the cloth's bending response, so motion_vectors is
the only affected data type, since it is the only one captured after
stepping the environment. It scored 3.32% against a 3.00% threshold,
identically on both CI shards. Every static data type still matches,
because the rest geometry is unchanged.

The new image is the reference output from the CI run for this branch.

Author: mmichelis