moving text about custom style sheets out of solution

[abostroem]

Closes #238

The description of the style sheet is currently contained within the Exercise solution. This PR moves it out to be part of the main text

[github-actions]

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🤖 This automated message can help you check the rendered files in your submission for clarity. If you have any questions, please feel free to open an issue in {sandpaper}.

If you have files that automatically render output (e.g. R Markdown), then you should check for the following:

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Rendered Changes

🔍 Inspect the changes: https://github.com/datacarpentry/astronomy-python/compare/md-outputs..md-outputs-PR-255

The following changes were observed in the rendered markdown documents:

 08-plot.md | 6 ++----
 md5sum.txt | 2 +-
 2 files changed, 3 insertions(+), 5 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 2025-12-08 23:31:33 +0000