Bump nltk from 3.9.2 to 3.9.4 in /requirements

[dependabot]

Bumps nltk from 3.9.2 to 3.9.4.

Changelog

Sourced from nltk's changelog.

Version 3.10.0 2026-06-11

• Enforce the stricter nltk.pathsec security policy by default
• Document the new security model and migration guidance
• Harden resource loading against path traversal and SSRF/DNS-rebinding
• Harden downloader path handling and block XML entity expansion
• Close remaining corpus-reader security edge cases
• Replace unsafe exec() usage in the utility CLI
• Warn on unpickling user-provided pickles
• Add HuggingFace datasets integration (nltk.huggingface)
• Align TnT with Brants (2000) specifications
• Fix PorterStemmer irregular-form lowercasing in NLTK mode
• Fix TransitionParser sparse index dtype for scikit-learn 1.9
• Fix TextCat tie handling
• Fix WordNet object comparisons for incompatible types
• Cache WordNet max depth lazily for lch_similarity()
• Fix CCG variable direction, substitution, and type-raising bugs
• Fix Jaro similarity for single-character and empty-string cases
• Improve CI and release-maintenance workflows

Thanks to the following contributors to 3.10.0: 13rac1, alvations, bowiechen, devesh-2002, ekaf, elias-ba, haosenwang1018, HyperPS, ihitamandal, jancallewaert, jhnwnstd, JuanIMartinezB, Lemm1, LinZiyuu, Mr-Neutr0n, PastelStorm, scruge1, Syzygy2048, ylwango613, yzhaoinuw

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)

... (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