Update assetic.rst

Author: Acinonux

reference/configuration/assetic.rst

@@ -16,8 +16,8 @@ Full Default Configuration
  use_controller:
  enabled: "%kernel.debug%"
  profiler: false
- read_from: "%kernel.root_dir%/../web"
- write_to: "%assetic.read_from%"
+ read_from: "%assetic.read_from%"
+ write_to: "%kernel.root_dir%/../web"
  java: /usr/bin/java
  node: /usr/bin/node
  ruby: /usr/bin/ruby