Upgrade dependencies in requirements.txt

[jpfeuffer]

Updated Sphinx and related packages to latest versions.

Summary by CodeRabbit

• Chores
  • Updated documentation build dependencies to newer compatible versions
  • Removed legacy dependency constraints
  • Normalized dependency declarations

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[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

Updated docs/requirements.txt with newer dependency versions: sphinx upgraded to 9.0.4, pydata_sphinx_theme renamed, readthedocs-sphinx-search and sphinx-copybutton updated, snowballstemmer<3 constraint removed, and extra-index-url directive removed. Minor formatting normalization applied.

Changes

Cohort / File(s)	Summary
Documentation dependencies docs/requirements.txt	Upgraded sphinx to 9.0.4; renamed pydata_sphinx_theme; updated readthedocs-sphinx-search and sphinx-copybutton to latest versions; removed snowballstemmer<3 constraint; removed extra-index-url directive; normalized pyopenms formatting; updated comment to reflect December 2025

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

• Verify that sphinx 9.0.4 and updated packages are compatible with existing documentation build configuration
• Confirm pydata_sphinx_theme naming change (hyphenated vs. underscore) and version stability
• Ensure removal of snowballstemmer<3 constraint doesn't introduce unexpected stemming behavior

Poem

🐰 A rabbit hops through versioned halls,
Dependencies dust and snowballstemmer falls,
Sphinx shines bright at 9-point-oh,
Extra indices fade, simpler paths to go! 📚✨

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch jpfeuffer-patch-2

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📜 Recent review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 46b9dac and 028e45b.

📒 Files selected for processing (1)

• docs/requirements.txt (1 hunks)

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