:pencil2: Fix typo in lecture-5.ipynb
:pencil2: Fix typo in lecture-5.ipynb

alvaroing12/CADL,niazangels/CADL,goddoe/CADL,pkmital/CADL,alvaroing12/CADL,goddoe/CADL,niazangels/CADL,padipadou/CADL,padipadou/CADL,pkmital/CADL