Fix a broken link in intro.py (#3430)

Author: pankajkakkar

beginner_source/basics/intro.py

@@ -43,7 +43,7 @@
 If you're familiar with other deep learning frameworks, check out the `0. Quickstart <quickstart_tutorial.html>`_ first
 to quickly familiarize yourself with PyTorch's API.
 
-If you're new to deep learning frameworks, head right into the first section of our step-by-step guide: `1. Tensors <tensor_tutorial.html>`_.
+If you're new to deep learning frameworks, head right into the first section of our step-by-step guide: `1. Tensors <tensorqs_tutorial.html>`_.
 
 
 .. include:: /beginner_source/basics/qs_toc.txt