build(deps): bump nltk from 3.9.3 to 3.9.4 in /requirements

[dependabot]

Bumps nltk from 3.9.3 to 3.9.4.

Changelog

Sourced from nltk's changelog.

Version 3.9.4 2026-03-24

• Support Python 3.14
• Fix bug in Levenshtein distance when substitution_cost > 2
• Fix bug in Treebank detokeniser re quote ordering
• Fix bug in Jaro similarity for empty strings
• Several security enhancements
• Fix GHSA-rf74-v2fm-23pw: unbounded recursion in JSONTaggedDecoder
• Implement TextTiling vocabulary introduction method (Hearst 1997)
• Fix ALINE feature matrix errors and add comprehensive tests
• Support multiple VerbNet versions, fix longid/shortid regex for VerbNet ids
• Let downloader fallback to md5 when sha256 is unavailable
• Several other minor bugfixes and code cleanups

Thanks to the following contributors to 3.9.4: Min-Yen Kan, Eric Kafe, Emily Voss, bowiechen, Hrudhai01, jancallewaert, Mr-Neutr0n, pollak.peter89, ylwango613,

Version 3.9.3 2026-02-21

• Fix CVE-2025-14009: secure ZIP extraction in nltk.downloader (#3468)
• Block path traversal/arbitrary reads in nltk.data for protocol-less refs (#3467)
• Block path traversal/abs paths in corpus readers and FS pointers (#3479, #3480)
• Validate external StanfordSegmenter JARs using SHA256 (#3477)
• Add optional sandbox enforcement for filestring() (#3485)
• Maintenance: downloader/zipped models, CI/tooling updates

Thanks to the following contributors to 3.9.3: Chris Clauss, Eric Kafe, HyperPS, purificant, Shivansh-Game, Christopher Smith

Version 3.9.2 2025-10-01

• Update download checksums to use SHA256 in built index
• Fix percentage escape in new-style string formatting
• replace shortened URLs using goo.gl
• Make Wordnet interoperable with various taggers and tagged corpora
• Fix saving PerceptronTagger
• Document how to reproduce old Wordnet studies
• properly initialize Portuguese corpus reader
• support for mixed rules conversion into Chomsky Normal Form
• only import tkinter if a GUI is needed
• issue #2112 with Corenlp
• new environment variable NLTK_DOWNLOADER_FORCE_INTERACTIVE_SHELL
• Lesk defaults to most frequent sense in case of ties

Thanks to the following contributors to 3.9.2: Jose Cols, Peter de Blanc, GeneralPoxter, Eric Kafe, William LaCroix, Jason Liu, Samer Masterson, Mike014, purificant, Andrew Ernest Ritz, samertm, Ikram Ul Haq, Christopher Smith, Ryan Mannion

Version 3.9.1 2024-08-19

... (truncated)

Commits

• ad9c96b Update copyright year
• 7edcddf Updates for 3.9.4 release
• 67a2736 Merge pull request #3180 from yzhaoinuw/bug-on-edit_distance_align
• 2b17ac5 Fix edit_distance_align backtrace for high substitution costs
• 4b72976 Merge pull request #3018 from JuanIMartinezB/bug/shortid-longid
• 8a5619f Merge pull request #3222 from Syzygy2048/feature/texttiling-vocabulary-introd...
• c6574d7 Merge pull request #3289 from ihitamandal/codeflash/optimize-windowdiff-2024-...
• 98ff5d9 Merge pull request #3435 from Hrudhai01/fix-3260-detokenize-quotes
• aec4fce Merge pull request #3522 from ekaf/pathsec
• eec4ee3 Merge pull request #3526 from nltk/update-contributing
• Additional commits viewable in compare view

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.91%. Comparing base (35a295f) to head (1b62068).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #2578   +/-   ##
=======================================
  Coverage   85.91%   85.91%           
=======================================
  Files         250      250           
  Lines       16604    16604           
  Branches     1639     1639           
=======================================
  Hits        14266    14266           
  Misses       2001     2001           
  Partials      337      337           

Flag	Coverage Δ
unittests	85.91% <ø> (ø)

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