Evaluating Learning objectives exercise - add non-coding example

### How could the content be improved?

@tobyhodges noted in teaching today that we should include a non-coding example in the evaluating learning objectives exercise in the objectives episode.

### Which part of the content does your suggestion apply to?

https://carpentries.github.io/lesson-development-training/instructor/objectives.html

Start with the evaluating learning objectives exercise in instructor/objectives.html, the content section identified in the issue. Add a non-coding example alongside the existing exercise examples, then verify that the exercise still clearly demonstrates evaluating learning objectives.

Written by the indexing model from the issue text.