Bump nltk

Bumps [nltk](https://github.com/nltk/nltk) from 3.8.1 to 3.9.
- [Changelog](https://github.com/nltk/nltk/blob/develop/ChangeLog)
- [Commits](nltk/nltk@3.8.1...3.9)

---
updated-dependencies:
- dependency-name: nltk
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

cloud-infrastructure/ai-infra-gpu/ai-infrastructure/rag-langchain-vllm-mistral/files/requirements.txt

@@ -87,7 +87,7 @@ nest-asyncio==1.6.0
 networkx==3.3
 newspaper3k==0.2.8
 ninja==1.11.1.1
-nltk==3.8.1
+nltk==3.9
 numba==0.59.1
 numpy==1.26.4
 nvidia-cublas-cu12==12.1.3.1