Bump nltk from 3.9.2 to 3.9.3

Bumps [nltk](https://github.com/nltk/nltk) from 3.9.2 to 3.9.3.
- [Changelog](https://github.com/nltk/nltk/blob/develop/ChangeLog)
- [Commits](nltk/nltk@3.9.2...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]

docs/requirements.txt

@@ -46,7 +46,7 @@ narwhals==2.13.0
     # via plotly
 niapy==2.6.1
     # via niaarm (pyproject.toml)
-nltk==3.9.2
+nltk==3.9.3
     # via niaarm (pyproject.toml)
 numpy==2.3.5
     # via