Update tensorqs_tutorial.py (#2130)

fixes #1659

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

Author: subramen

beginner_source/basics/tensorqs_tutorial.py

@@ -142,6 +142,7 @@
 # **Arithmetic operations**
 
 # This computes the matrix multiplication between two tensors. y1, y2, y3 will have the same value
+# ``tensor.T`` returns the transpose of a tensor
 y1 = tensor @ tensor.T
 y2 = tensor.matmul(tensor.T)