Typo in tensorqs_tutorial.py (#2242)

Looks like "op" should be "option" here

Co-authored-by: Svetlana Karslioglu <svekars@fb.com>

Author: lamek

Diff for: beginner_source/basics/tensorqs_tutorial.py

@@ -133,7 +133,7 @@
 ######################################################################
 # **Joining tensors** You can use ``torch.cat`` to concatenate a sequence of tensors along a given dimension.
 # See also `torch.stack <https://pytorch.org/docs/stable/generated/torch.stack.html>`__,
-# another tensor joining op that is subtly different from ``torch.cat``.
+# another tensor joining option that is subtly different from ``torch.cat``.
 t1 = torch.cat([tensor, tensor, tensor], dim=1)
 print(t1)