Update nltk to 3.9.3

[Okal (okal)]

Fixes CVE-2025-14009 present in nltk <= 3.9.2, resolved in 3.9.3. Closes #923.

Summary by CodeRabbit

• Chores
  • Updated optional dependency version to improve compatibility and stability.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between 7f41401 and 0cc5808.

⛔ Files ignored due to path filters (1)

• poetry.lock is excluded by !**/*.lock

📒 Files selected for processing (1)

• pyproject.toml

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📝 Walkthrough

Walkthrough

The pyproject.toml file has been updated to bump the optional nltk dependency from version 3.9.1 to 3.9.3. This addresses a critical vulnerability identified by the team's dependabot scanner. No other dependencies or public APIs are affected.

Changes

Cohort / File(s)	Summary
Dependency Update pyproject.toml	Updated nltk version from 3.9.1 to 3.9.3 to resolve a critical security vulnerability.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and concisely summarizes the main change: updating the nltk dependency to version 3.9.3.
Linked Issues check	✅ Passed	The PR directly addresses issue #923 by upgrading nltk to 3.9.3, which remediates the reported CVE-2025-14009 vulnerability.
Out of Scope Changes check	✅ Passed	All changes are scoped to updating the nltk dependency version in pyproject.toml, with no unrelated modifications present.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

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