Update README.md

Author: prabhuomkar

tutorials/popular/blitz/README.md

@@ -7,4 +7,7 @@
 	https://pytorch.org/tutorials/beginner/blitz/autograd_tutorial.html
 
 3. *[neural_networks](tutorials/popular/blitz/neural_networks)*: Neural Networks  
-	https://pytorch.org/tutorials/beginner/blitz/neural_networks_tutorial.html
+	https://pytorch.org/tutorials/beginner/blitz/neural_networks_tutorial.html
+
+4. *[training_a_classifier](tutorials/popular/blitz/training_a_classifier)*: Training a Classifier  
+	https://pytorch.org/tutorials/beginner/blitz/cifar10_tutorial.html