Add bang to stream_to! entry in CHANGELOG

Author: José Valim

CHANGELOG.md

@@ -2,7 +2,7 @@
 
 * Enhancements
   * [Exception] Allow `exception/1` to be overriden and promote it as the main mechanism to customize exceptions
-  * [File] Add `File.stream_to/3`
+  * [File] Add `File.stream_to!/3`
   * [Kernel] Add `List.delete_at/2` and `List.updated_at/3`
   * [Kernel] Add `Enum.reverse/2`
   * [Kernel] Implement `defmodule/2`, `@/1`, `def/2` and friends in Elixir itself. `case/2`, `try/2` and `receive/1` have been made special forms. `var!/1`, `var!/2` and `alias!/1` have also been implemented in Elixir and demoted from special forms