Fix typo in using_pytorch.rst

There was a typo in requirements.txt file

Author: ScherKhan

doc/frameworks/pytorch/using_pytorch.rst

@@ -862,7 +862,7 @@ see `For versions 1.1 and lower <#for-versions-1.1-and-lower>`_.
     |               |--inference.py
     |               |--requirements.txt
 
-Where ``requirments.txt`` is an optional file that specifies dependencies on third-party libraries.
+Where ``requirements.txt`` is an optional file that specifies dependencies on third-party libraries.
 
 Create a ``PyTorchModel`` object
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