Fix broken link (#3095)

Filing this to fix a bad link originally flagged by @gcheron in #3091 

@Bobgy requested a signed CLA, 4 days ago. Rather than wait any longer, let's go ahead and get this fixed.

Author: shannonbradshaw

content/en/docs/components/training/mpi.md

@@ -63,7 +63,7 @@ kubectl kustomize base | kubectl apply -f -
 
 ## Creating an MPI Job
 
-You can create an MPI job by defining an `MPIJob` config file. See [TensorFlow benchmark example](https://github.com/kubeflow/mpi-operator/blob/master/examples/v1alpha2/tensorflow-benchmarks.yaml) config file for launching a multi-node TensorFlow benchmark training job. You may change the config file based on your requirements.
+You can create an MPI job by defining an `MPIJob` config file. See [TensorFlow benchmark example](https://github.com/kubeflow/mpi-operator/blob/master/examples/v2beta1/tensorflow-benchmarks.yaml) config file for launching a multi-node TensorFlow benchmark training job. You may change the config file based on your requirements.
 
 ```
 cat examples/v2beta1/tensorflow-benchmarks.yaml