chore(deps): update pre-commit hook kynan/nbstripout to v0.9.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
kynan/nbstripout	repository	minor	0.7.1 → 0.9.0

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Release Notes

kynan/nbstripout (kynan/nbstripout)

v0.9.0

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• Add GitHub Action checking that output is stripped (@​lagamura, #​205, #​207)
• Add --drop-output-type, --keep-output-type flags (@​rgeorgi, #​175, #​204)
• Drop support for Python 3.8 and 3.9, add support for Python 3.13 and 3.14
• Migrate to pyproject.toml, remove setup.py and setup.cfg

v0.8.2

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• Preserve Windows CRLF file endings in output file (#​202)
• Prevent BrokenPipeError when flushing the output (@​blaketastic2, #​203)
• README: update usage instructions for git-filter-repo (@​fztrevisan, #​201)
• README: add note about argument quoting for pre-commit hook (#​119).
• Use ruff for code formatting
• Add type annotations

v0.8.1

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• In dry run mode, only print output if there would have been a change (#​152).
• Declare git filter to be required when installing, such that it must
  succeed (#​191).

v0.8.0

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• Adds --verify flag, similar to --dry-run but returning 1 if any
  affected files would have changed (@​jspaezp, #​153, #​195).
• Adds script to apply nbstripout retroactively using git-filter-repo to
  README (@​LunarLanding @​tokleine, #​194 #​197).
• Documents nbstripout on all files in the current directory and
  subdirectories recursively (#​127).
• Accepts notebooks without nbformat version specified.
• Improves test coverage.

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