Fixed duplicate cell bug
Fixes Duplicate cells in entity linking notebook bug

Bug 3509934 (https://nvbugswb.nvidia.com/NVBugs5/redir.aspx?url=/3509934 [ML-NeMo][Quadro GV100] Entity_Linking_Medical.ipynb tutorial notebook contains duplicate cells)

Signed-off-by: Virginia Adams <vadams@nvidia.com>