Bump nltk from 3.9.1 to 3.9.3

Bumps [nltk](https://github.com/nltk/nltk) from 3.9.1 to 3.9.3.
- [Changelog](https://github.com/nltk/nltk/blob/develop/ChangeLog)
- [Commits](nltk/nltk@3.9.1...3.9.3)

---
updated-dependencies:
- dependency-name: nltk
  dependency-version: 3.9.3
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -102,7 +102,7 @@ nbconvert==7.16.6
 nbformat==5.10.4
 nest-asyncio==1.6.0
 networkx==3.5
-nltk==3.9.1
+nltk==3.9.3
 notebook==7.4.5
 notebook_shim==0.2.4
 numpy==2.3.3