Bump nltk

Bumps [nltk](https://github.com/nltk/nltk) from 3.4.5 to 3.9.
- [Changelog](https://github.com/nltk/nltk/blob/develop/ChangeLog)
- [Commits](nltk/nltk@3.4.5...3.9)

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

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

build-info-extractor-pip/src/test/resources/org/jfrog/build/extractor/requirementsProject/requirements.txt

@@ -1,3 +1,3 @@
 PyYAML==6.0.1
 macholib==1.11
-nltk==3.4.5
+nltk==3.9