Fix mismatch in exercise

[ErinBecker]

This exercise has a mismatch between the exercise name and the regular expression that is used in the exercise. The solution matches the regular expression that is used in the exercise, but not the exercise name (which has an extra \). This PR removes the extra \ from the exercise name so that it matches the exercise and the solution.

[github-actions[bot]]

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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

:mag: Inspect the changes: https://github.com/LibraryCarpentry/lc-data-intro/compare/md-outputs..md-outputs-PR-217

The following changes were observed in the rendered markdown documents:

 01-regular-expressions.md | 2 +-
 md5sum.txt                | 2 +-
 2 files changed, 2 insertions(+), 2 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. This output provides a way for you to inspect the output in a diff-friendly manner so that it's easy to see the changes that occur due to new software versions or randomisation.

:stopwatch: Updated at 2023-10-16 16:53:31 +0000

[sharilaster]

Oh good catch, thank you @ErinBecker!

[ErinBecker]

Wow! Thanks for the quick review @sharilaster!