Fix broken link to the S3IT docs

README.md

@@ -70,7 +70,7 @@ matplotlib
 ndcctools
 ```
 
-To add this environment as a [custom kernel in Jupyter](https://docs.s3it.uzh.ch/apps/apps_user_guide/#custom-kernels-in-jupyter) if you intend on using it on the ScienceApps, run the following code on a ScienceCluster terminal after creating the environment:
+To add this environment as a [custom kernel in Jupyter](https://docs.s3it.uzh.ch/cluster/apps/user_guide/#custom-kernels-in-jupyter) if you intend on using it on the ScienceApps, run the following code on a ScienceCluster terminal after creating the environment:
 ```
 module load anaconda3
 source activate tfbenchmark