[Bug Report] vowpal wabbit container `sagemaker-rl-vw-container:adf` is no longer publicly available or has been removed

**Link to the notebook**

https://github.com/aws/amazon-sagemaker-examples/blob/main/reinforcement_learning/bandits_recsys_movielens_testbed/bandits_movielens_testbed.ipynb

**Describe the bug**

The vowpal wabbit container `462105765813.dkr.ecr.us-west-2.amazonaws.com/sagemaker-rl-vw-container:adf` used in the [notebook](https://github.com/aws/amazon-sagemaker-examples/blob/main/reinforcement_learning/bandits_recsys_movielens_testbed/bandits_movielens_testbed.ipynb) is no longer publicly available or has been removed. Running the notebook will result in the error:

```
"name": "CalledProcessError",
"message": "Command '['docker', 'pull', '462105765813.dkr.ecr.us-west-2.amazonaws.com/sagemaker-rl-vw-container:adf]' returned non-zero exit status 1."
```
Suggesting that docker was unable to pull the image from the ECR repository.

**To reproduce**

Run the referenced notebook in local mode.

**Logs**
If applicable, add logs to help explain your problem.
You may also attach an `.ipynb` file to this issue if it includes relevant logs or output.

Start with reinforcement_learning/bandits_recsys_movielens_testbed/bandits_movielens_testbed.ipynb and run it in local mode, beginning with the Docker pull for sagemaker-rl-vw-container:adf. Check whether the referenced ECR image is available or whether the notebook identifies a replacement; done means the notebook can pull its container and run without the reported CalledProcessError.

Written by the indexing model from the issue text.