Fix typos found with codespell

[stellaprins]

Found a few typos when working on the instance segmentation lesson.

This PR fixes typos flagged up by running codespell.

[github-actions]

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Rendered Changes

🔍 Inspect the changes: https://github.com/HealthBioscienceIDEAS/microscopy-novice/compare/md-outputs..md-outputs-PR-130

The following changes were observed in the rendered markdown documents:

 choosing-acquisition-settings.md           |  4 ++--
 designing-a-light-microscopy-experiment.md |  2 +-
 filetypes-and-metadata.md                  |  2 +-
 imaging-software.md                        |  4 ++--
 instance-segmentation-and-measurements.md  | 10 +++++-----
 md5sum.txt                                 | 14 +++++++-------
 multi-dimensional-images.md                |  4 ++--
 quality-control-and-manual-segmentation.md |  4 ++--
 8 files changed, 22 insertions(+), 22 deletions(-)

What does this mean?

If you have source files that require output and figures to be generated (e.g. R Markdown), then it is important to make sure the generated figures and output are reproducible.

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⏱️ Updated at 2026-06-09 10:40:14 +0000

[thompson318]

Nice to get rid of the flour essence.

[K-Meech]

Thanks for catching these typos @stellaprins - looks good!
One comment below - I think we should avoid modifying the auto-generated / updated workflow files from the Carpentries workbench.