retitle dispatcher tutorial (#1168)

Basil Hosmer · web-flow · commit bd1dfa397402 · 2020-09-28T14:08:51.000-07:00
diff --git a/advanced_source/dispatcher.rst b/advanced_source/dispatcher.rst
@@ -1,5 +1,5 @@
-Dispatcher in C++
-=================
+Registering a Dispatched Operator in C++
+========================================
 
 The dispatcher is an internal component of PyTorch which is responsible for
 figuring out what code should actually get run when you call a function like
