Update static quantization tutorial code link to go to mobilenetv2.py

The link says most of the code is from "here", but it goes to mobilenet.py which is just imports.
Most of the code comes from mobilenetv2.py.

Signed-off-by: markstur <mark.sturdevant@ibm.com>

Author: markstur

advanced_source/static_quantization_tutorial.rst

@@ -59,7 +59,7 @@ to enable quantization:
 - Replace ReLU6 with ReLU 
 
 Note: this code is taken from 
-`here <https://github.com/pytorch/vision/blob/master/torchvision/models/mobilenet.py>`_.  
+`here <https://github.com/pytorch/vision/blob/main/torchvision/models/mobilenetv2.py>`_.
 
 .. code:: python