Update nltk (#296)

* Update requirements.txt

* Update fsi.nlp.requirements.txt

Author: dciborow

.depends/fsi.nlp.requirements.txt

@@ -16,7 +16,7 @@ pyodbc==4.0.32
 py-rouge==1.1
 python-dotenv==0.19.0
 torch==1.7.1
-nltk==3.6.2
+nltk==3.6.4
 numpy==1.19.5
 protobuf==3.17.3
 scipy==1.5.4

.depends/requirements.txt

@@ -84,7 +84,7 @@ nbformat==5.1.3
 netCDF4==1.5.7
 networkx==2.5.1
 newspaper3k==0.2.8
-nltk==3.6.2
+nltk==3.6.4
 numba==0.52.0
 opencensus-ext-azure>=1.0.5
 opencv-python-headless==4.3.0.36