Bump nltk from 3.9 to 3.9.3

Bumps [nltk](https://github.com/nltk/nltk) from 3.9 to 3.9.3.
- [Changelog](https://github.com/nltk/nltk/blob/develop/ChangeLog)
- [Commits](nltk/nltk@3.9...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_test.txt

@@ -51,7 +51,7 @@ nbclient==0.6.8
 nbformat==5.10.4
 nest-asyncio==1.6.0
 networkx==3.3
-nltk==3.9
+nltk==3.9.3
 numpy==1.26.4
 openpyxl==3.1.2
 packaging==24.0