Bump nltk from 3.6.5 to 3.6.6

Bumps [nltk](https://github.com/nltk/nltk) from 3.6.5 to 3.6.6.
- [Release notes](https://github.com/nltk/nltk/releases)
- [Changelog](https://github.com/nltk/nltk/blob/develop/ChangeLog)
- [Commits](nltk/nltk@3.6.5...3.6.6)

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

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

Author: dependabot[bot]

docker_requirements.txt

@@ -4,7 +4,7 @@ python-crfsuite==0.9.7
 requests==2.25.*
 tinydb==4.3.*
 gensim==4.0.*
-nltk==3.6.5
+nltk==3.6.6
 emoji==0.5.2
 attacut==1.0.6
 epitran==1.9