message: [docs] fix link to `AbsVal` layer
diff: @@ -87,7 +87,7 @@ Layers:
  * [ELU](layers/elu.html) - exponential linear rectification.
  * [Sigmoid](layers/sigmoid.html)
  * [TanH](layers/tanh.html)
  -* [Absolute Value](layers/abs.html)
  +* [Absolute Value](layers/absval.html)
  * [Power](layers/power.html) - f(x) = (shift + scale * x) ^ power.
  * [Exp](layers/exp.html) - f(x) = base ^ (shift + scale * x).
  * [Log](layers/log.html) - f(x) = log(x).
  