movielens dataset is broken

/!\ PLEASE INCLUDE THE FULL STACKTRACE AND CODE SNIPPET

Short description
Description of the bug.

Run this simple code:
ratings = tfds.load("movielens/100k-ratings", split="train")

TFDS fails to download the dataset.

Environment information

• Operating System: Colab

• Python version:

• tensorflow-datasets/tfds-nightly version: latest stable and nightly

• tensorflow/tf-nightly version: 2.8

• Does the issue still exists with the last tfds-nightly package (pip install --upgrade tfds-nightly) ? yes

Reproduction instructions

ratings = tfds.load("movielens/100k-ratings", split="train")

If you share a colab, make sure to update the permissions to share it.

Link to logs
Downloading and preparing dataset 4.70 MiB (download: 4.70 MiB, generated: 32.41 MiB, total: 37.10 MiB) to /root/tensorflow_datasets/movielens/100k-ratings/0.1.0...
Dl Completed...: 0%
0/1 [00:00<?, ? url/s]
Dl Size...:
0/0 [00:00<?, ? MiB/s]
Extraction completed...:
0/0 [00:00<?, ? file/s]

OSError Traceback (most recent call last)
/usr/local/lib/python3.7/dist-packages/urllib3/connection.py in _new_conn(self)
158 conn = connection.create_connection(
--> 159 (self._dns_host, self.port), self.timeout, **extra_kw)
160

38 frames
OSError: [Errno 113] No route to host

During handling of the above exception, another exception occurred:

NewConnectionError Traceback (most recent call last)
NewConnectionError: <urllib3.connection.HTTPConnection object at 0x7f1763b62090>: Failed to establish a new connection: [Errno 113] No route to host

During handling of the above exception, another exception occurred:

MaxRetryError Traceback (most recent call last)
MaxRetryError: HTTPConnectionPool(host='files.grouplens.org', port=80): Max retries exceeded with url: /datasets/movielens/ml-100k.zip (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f1763b62090>: Failed to establish a new connection: [Errno 113] No route to host'))

During handling of the above exception, another exception occurred:

ConnectionError Traceback (most recent call last)
/usr/local/lib/python3.7/dist-packages/requests/adapters.py in send(self, request, stream, timeout, verify, cert, proxies)
514 raise SSLError(e, request=request)
515
--> 516 raise ConnectionError(e, request=request)
517
518 except ClosedPoolError as e:

ConnectionError: HTTPConnectionPool(host='files.grouplens.org', port=80): Max retries exceeded with url: /datasets/movielens/ml-100k.zip (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f1763b62090>: Failed to establish a new connection: [Errno 113] No route to host'))

Expected behavior
What you expected to happen.

Additional context
Add any other context about the problem here.

Start by running the reported tfds.load("movielens/100k-ratings", split="train") reproduction and inspect the failure reaching files.grouplens.org/datasets/movielens/ml-100k.zip. No repository file or test is named in the issue; done means the dataset downloads and loads successfully in the reported environment.