Update list of issues requiring attention in introduction section

[bencomp]

If this pull request addresses an open issue on the repository, please add 'Closes #NN' below, where NN is the issue number.
Closes #183

Please briefly summarise the changes made in the pull request, and the reason(s) for making these changes.
The instructor note lists several issues that need attention, but one was completed and another has been replaced by a different issue.

If any relevant discussions have taken place elsewhere, please provide links to these.
n/a

[github-actions]

Thank you!

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The following changes were observed in the rendered markdown documents:

 01-introduction.md | 6 ++----
 md5sum.txt         | 2 +-
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⏱️ Updated at 2025-02-10 15:32:41 +0000

[marijane]

looks good!