chore(deps): bump nltk from 3.6.5 to 3.6.6 (#142)

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>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: irinaschubert <irina.schubert@dasch.swiss>

requirements.txt

@@ -29,7 +29,7 @@ mkdocs-include-markdown-plugin==3.2.3
 mkdocs-material==7.2.3
 mkdocs-material-extensions==1.0.3
 mkdocstrings==0.16.2
-nltk==3.6.5
+nltk==3.6.6
 openpyxl==3.0.9
 packaging==21.2
 pkginfo==1.7.1