Fix typo in URL to Custom Federated Algorithms Part 2 tutorial.
"This first part is more conceptual; we introduce some of the key concepts and\n",
"programming abstractions used in TFF, and we demonstrate their use on a very\n",
"simple example with a distributed array of temperature sensors. In\n",
- "[the second part of this series](custom_federated_alrgorithms_2.ipynb), we use\n",
+ "[the second part of this series](custom_federated_algorithms_2.ipynb), we use\n",
"the mechanisms we introduce here to implement a simple version of federated\n",
"training and evaluation algorithms. As a follow-up, we encourage you to study\n",
"[the implementation](https://github.com/tensorflow/federated/blob/master/tensorflow_federated/python/learning/federated_averaging.py)\n",
