Add a slide on order of evaluation for function arguments

[hageboeck]

During a discussion in the essentials course we noticed that we never discuss the order of evaluation of arguments.
This might be a topic for the advanced course.

[hageboeck]

Hello @krishnasingh-09,
that's great to hear, go for it!

We will be happy to review once it's done!

[stale]

This issue or pull request has been automatically marked as stale because it has not had recent activity. Please manually close it, if it is no longer relevant, or ask for help or support to help getting it unstuck. Let me bring this to the attention of @klieret @wdconinc @michmx for now.