Update oclSample.py

Updated STL addon name to match Blender 4.2 naming conventions

scripts/addons/cam/opencamlib/oclSample.py

@@ -17,7 +17,7 @@ except ImportError:
         pass
 
 try:
-    from io_mesh_stl import blender_utils
+    from bl_ext.blender_org.stl_format_legacy import blender_utils
 except ImportError:
     pass