Alchemy Vision lab - suggested update

[hannahsaid]

Perhaps the lab instructions could be updated to say to edit the image analysis node to set Detect = Faces as by default this field is blank.

[chughts]

@hannahsaid , I can give you access to the repository so you can make the changes. Otherwise I suggest you clone the project, make the changes and commit giving me a pull request to merge your changes into this repository.