[Snyk] Security upgrade nltk from 3.8.1 to 3.9.3

[sihrc]

Snyk has created this PR to fix 1 vulnerabilities in the pip dependencies of this project.

Snyk changed the following file(s):

• requirements.txt

⚠️ Warning

ipywidgets 8.1.8 has requirement widgetsnbextension~=4.0.14, but you have widgetsnbextension 4.0.5.
ipywidgets 8.1.8 has requirement comm>=0.1.3, but you have comm 0.1.2.
indico-client 5.1.4 requires pandas, which is not installed.
indico-client 5.1.4 has requirement importlib-metadata~=1.0, but you have importlib-metadata 6.7.0.

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Important

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• Some vulnerabilities couldn't be fully fixed and so Snyk will still find them when the project is tested again. This may be because the vulnerability existed within more than one direct dependency, but not all of the affected dependencies could be upgraded.

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Note

Low Risk
Single dependency version bump in requirements.txt with no code changes; main risk is potential behavioral/regression differences in nltk at runtime.

Overview
Bumps the pinned nltk dependency in requirements.txt from 3.8.1 to 3.9.3 as a security remediation.

No other dependencies or application code are changed in this PR.

^{Written by Cursor Bugbot for commit 5faf40b. This will update automatically on new commits. Configure here.}