Fix: normalize matrix before converting to euler

Without this, Blender aborts due to an assert.

source/blender/nodes/geometry/nodes/node_geo_input_instance_rotation.cc

@@ -22,7 +22,7 @@ class InstanceRotationFieldInput final : public bke::InstancesFieldInput {
   GVArray get_varray_for_context(const bke::Instances &instances, IndexMask /*mask*/) const final
   {
     auto rotation_fn = [&](const int i) -> float3 {
-      return float3(math::to_euler(instances.transforms()[i]));
+      return float3(math::to_euler(math::normalize(instances.transforms()[i])));
     };
 
     return VArray<float3>::ForFunc(instances.instances_num(), rotation_fn);