Fix :from_interpolation docs (#13251)

Author: mhanberg

lib/elixir/lib/macro.ex

@@ -115,7 +115,7 @@ defmodule Macro do
     * `:from_brackets` - Used to determine whether a call to `Access.get/3` is from
       bracket syntax.
 
-    * `:from_interpolation` - Used to determine whether a call to `Access.get/3` is
+    * `:from_interpolation` - Used to determine whether a call to `Kernel.to_string/1` is
       from interpolation.
 
     * `:generated` - Whether the code should be considered as generated by