Merge pull request #641 from PyThaiNLP/dependabot/pip/nltk-3.6.6

Bump nltk from 3.6.5 to 3.6.6

Author: wannaphong

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