part 4 (designer) instruction is out of date

[stephenhallfr-zz]

Hi, the instruction related to part 4 the designer is completely out of date:

• name of the product has changed to "designer"
• screenshots are not valid. The UI has completely changes
• the example, sample 3 does not exit in the list of choice

https://github.com/danielsc/azureml-workshop-2019/blob/master/1-workspace-concepts/4-designer.md