Link to chainer/chainer(rl), not pfnet/chainer(rl)

Author: muupan

docs/index.rst

@@ -7,13 +7,13 @@
 ChainerRL, a deep reinforcement learning library
 ================================================
 
-ChainerRL is a deep reinforcement learning library that implements various state-of-the-art deep reinforcement algorithms in Python using `Chainer <https://github.com/pfnet/chainer>`_, a flexible deep learning framework.
+ChainerRL is a deep reinforcement learning library that implements various state-of-the-art deep reinforcement algorithms in Python using `Chainer <https://github.com/chainer/chainer>`_, a flexible deep learning framework.
 
 .. toctree::
    :maxdepth: 2
 
    install
-   Quickstart Guide <https://github.com/pfnet/chainerrl/blob/master/examples/quickstart/quickstart.ipynb>
+   Quickstart Guide <https://github.com/chainer/chainerrl/blob/master/examples/quickstart/quickstart.ipynb>
    reference