Fix issue #32518: Update llm_tutorial.md

[doomdagadiggiedahdah]

remove comma re: issue 32518

#32518

What does this PR do?

Fixes #32518

Before submitting

• [ X ] This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
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• Did you make sure to update the documentation with your changes? Here are the
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  here are tips on formatting docstrings.
• Did you write any new necessary tests?

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[amyeroberts]

Thanks!