[UPDATE] Duplicate image in Unit 3 - The Deep Q Algorithm

[PierreCounathe]

What do you want to improve?

• In Unit 3. Deep Q Algorithm, there is the same image twice, I thought maybe the goal was either to set the second image to show the training phase (with a purple box), or maybe that's just a duplicate?

code link

• Cannot open a PR as I don't have access to the images