Update doc about cudnn version supported

35673bc1 · Frederic Bastien · a117388e · 35673bc1
--- a/doc/index.txt
+++ b/doc/index.txt
@@ -25,7 +25,7 @@ News

 * Multi-GPU.

-* We added support for :ref:`CuDNN v4 <libdoc_cuda_dnn>`.
+* We added support for :ref:`CuDNN v5 <libdoc_cuda_dnn>`.

 * We added support for :attr:`CNMeM <config.lib.cnmem>` to speed up
  the GPU memory allocation.