Update dispatcher.rst (pytorch#1690)

Fix version typo. :)

Co-authored-by: Brian Johnson <brianjo@fb.com>
Co-authored-by: Holly Sweeney <77758406+holly1238@users.noreply.github.com>

advanced_source/dispatcher.rst

@@ -109,7 +109,7 @@ speaking, the structure of your registrations will look like this:
 For operators that do not need autograd
 ---------------------------------------
 
-Note: This section only applies to versions of PyTorch ``>= 3.10``.
+Note: This section only applies to versions of PyTorch ``>= 1.10``.
 
 In the next section, we will discuss how to add autograd support to an operator.
 But for the ops that do not need autograd support, the following kernel should be