Fix wording in Task docs about Ancestor (#14742)

Co-authored-by: Nevroz Arslan <[email protected]>

Author: narslan

lib/elixir/lib/task.ex

@@ -228,7 +228,7 @@ defmodule Task do
 
   ## Ancestor and Caller Tracking
 
-  Whenever you start a new process, Elixir annotates the parent of that process
+  Whenever you start a new process, Elixir annotates the process with the parent
   through the `$ancestors` key in the process dictionary. This is often used to
   track the hierarchy inside a supervision tree.