fix(mesh): fix normals calculation for Blender 4.1

Add fix for the API changes in [Blender 4.1](https://projects.blender.org/blender/blender/commit/89e3ba4e25c9ff921b2584c294cbc38c3d344c34) regarding mesh normals calculations. It is backwards compatible with previous Blender versions.

Fix #208

addon/i3dio/node_classes/shape.py

@@ -131,7 +131,8 @@ def generate_evaluated_mesh(self, mesh_object: bpy.types.Object, reference_frame
         # Calculates triangles from mesh polygons
         self.mesh.calc_loop_triangles()
         # Recalculates normals after the scaling has messed with them
-        self.mesh.calc_normals_split()
+        if bpy.app.version < (4, 1, 0):
+            self.mesh.calc_normals_split()
 
     # On hold for the moment, it seems to be triggered at random times in the middle of an export which messes with
     # everything. Further investigation is needed.