Update dependency nltk to v3.9.4 [SECURITY] (#239) #311

Job	Run time
Is release?	15s
Repository changes	0s
Charts release	0s
Build E2B template	-1s
Build Docker Image	-1s
Python Tests	-1s
JS Tests	-1s
Release	0s
Code Interpreter Release Failed - Slack Notification	0s
	11s

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