Merge pull request #22 from aws-samples/dependabot/pip/mxnet-1.9.1

Bump mxnet from 1.8.0.post0 to 1.9.1

Author: anandkamat05

requirements.txt

@@ -1,7 +1,7 @@
 pip==22.3.0
 torch==1.13.1
 torchtext==0.14.1
-mxnet==1.8.0.post0
+mxnet==1.9.1
 gluonnlp==0.9.1
 nltk==3.8.1
 pandas==1.1.5