Bump nltk from 3.6.5 to 3.6.7 in /examples/albert (#449)

Co-authored-by: Alexander Borzunov <hxrussia@gmail.com>

examples/albert/requirements.txt

@@ -4,4 +4,4 @@ torch_optimizer==0.1.0
 wandb==0.10.26
 sentencepiece
 requests
-nltk==3.6.5
+nltk==3.6.7