Update dependency nltk to v3.9.4 [SECURITY] #464

Job	Run time
build-template / Build E2B Template	6m 58s
charts-tests / Chart Data Extractor - Build and test	30s
performance-tests / Performance tests	1m 4s
python-sdk / Python SDK - Build and test	2m 33s
js-sdk / JS SDK - Build and test	1m 32s
cleanup-build-template / Cleanup Build Template	12s
	12m 49s

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