"Improving Short-term Memory with Chunking" exercise needs a different (analogue) list of words

In episode 05-memory, the "Improving Short-term Memory with Chunking" exercise needs a different (analogue) list of words from the previous exercise ("Test Your Working Memory"). The on-line version will generate another list anyway but the analogue list should be different in order to objectively measure improvement when using chunking (as people have already seen the analogue list in the first exercise the improvement might simply be due to remembering some of them).

I would also move the [lovely diagram used to explain chunking](https://carpentries.github.io/instructor-training/fig/chunking.svg) above the second "Improving Short-term Memory with Chunking" exercise.

Happy to do a PR to fix this if others agree.

Start in the episode 05-memory lesson and compare the analogue lists in “Test Your Working Memory” and “Improving Short-term Memory with Chunking.” Use the linked chunking.svg diagram as the reference for its placement. Done means the second analogue list is different and the diagram appears above the second exercise.

Written by the indexing model from the issue text.