Fixed link in tune that was not working (#5331)

python/ray/tune/README.rst

@@ -9,9 +9,9 @@ User documentation can be `found here <http://ray.readthedocs.io/en/latest/tune.
 Tutorial
 --------
 
-To get started with Tune, try going through `our tutorial of using Tune with Keras <https://github.com/ray-project/tutorial/blob/master/tune_exercises/Tune.ipynb>`__.
+To get started with Tune, try going through `our tutorial of using Tune with Keras <https://github.com/ray-project/tutorial/blob/master/tune_exercises/exercise_1_basics.ipynb>`__.
 
-(Experimental): You can try out `the above tutorial on a free hosted server via Binder <https://mybinder.org/v2/gh/ray-project/tutorial/master?filepath=tune_exercises%2FTune.ipynb>`__.
+(Experimental): You can try out `the above tutorial on a free hosted server via Binder <https://mybinder.org/v2/gh/ray-project/tutorial/master?filepath=tune_exercises%2Fexercise_1_basics.ipynb>`__.
 
 
 Citing Tune